字母组合t h的读音规 则总结 标准化管理处编码[BBX968T-XBB8968-NNJ668-MM9N]
字母组合th的读音规则总结 现就中学英语课本中出现的含有字母组合th的单词，进行分类归纳，对其在单词中的读音总结以下几条。 1．在th后以字母-er结尾的单词中，th读浊辅音/e/。 例：altogether/:lt'gee/，farther/'fae/， feather/'fe e/，whether/'we e/，either/'aie/， gather/'ge/ 2．一般情况下，在代词、冠词、介词、连词或副词中的字母组合th，读浊辅音/e/。 例：within/wi'ein/，without/wi'eaut/，these/ei:z/，therefore/'eef:/，al-though/:leu/，those/ euz/，the/ e/，thus/ eas/ 发音特殊的单词：through/θru:/，throughout/θru:'aut/ 3．字母组合th在数词（包括基数词和序数词）中读清辅音/θ/。 例：three/θri:/，thirty/'θ:ti/，thirteen/'θ:'ti:n/， third/ θ:d/，fourth/f:θ/，fiftieth/'fiftiiθ/， thousand/'θauznd/，hundredth/'handrdθ/ 4．除上述单词外，一般位于词首的th读/θ/。 例：theatre/'θit/，thick/θik/，thin/θin/，throat/θrut/， theory/'θiri/，thrust/θrast/，thread/θred/，thorough/'θar/， Thursday/'θ:zdi/ 5．以th结尾的单词，th读清辅音/θ/。 例：truth/tru:θ/，worth/w:θ/，breath/breθ/，both/buθ/，cloth/klθ/，path/pa:θ/，wealth/welθ/，length/leθ/，strength/streθ/
辅音字符th 有清与浊两种读音： 1 当位于词首时，可以从词性上判别其应有的读音。请看： 第一类：在以下4种词类th 读清音，即国际音标的θ ： a. Noun 名词：thing, theatre, thumb大拇指, thunder雷, thermos热水瓶, Thursday, theory, theme, throat喉咙, thread线 b. Verb 动词：think, thank, throw, thrive, thicken, c.Numeral 数词：three, thirteen, thirty, third, thousand d.Adjective 形容词：thin, thick, thirsty, thoughtful, thorough彻底的 第二类：在以下两种词类th 读浊音： a. Pronoun 代词：they, them, their, theirs, this, these, that, those, there, thy[旧时用法]你的 b. Functional terms 功能词：the, than, then, though, thus, therefore 2 当位于词尾（或音节之尾）时，其读音多数是清音，如：bath, breath, both, cloth, tooth, health, wealth, arithmetic 等。只有在少数单词中，如：with, smooth 中读浊音。 3 当位于两个元音之间时，其读音多数是浊音。如：other, mother, brother, another, father, weather, feather, leather, further, breathe. 但是，也有读清音的。如在单词 method, nothing, anything, sympathy, sympathetic, mathematics, healthy, wealthy, Luther, Marathon(马拉松)等
th字母组合的发音规律 1．在th后以字母-er结尾的单词中，th读浊辅音/e/。 例：altogether/?:lt?'gee?/， farther/'fae?/， feather/'fe e?/， whether/'we e?/，either/'aie?/，gather/'g?e?/ 2．一般情况下，在代词、冠词、介词、连词或副词中的字母组合th，读浊辅音/e/。 例：within/wi'ein/，without/wi'eaut/，these/ei:z/，therefore/'ee?f?:/， al-though/?:le?u/，those/ e?uz/，the/ e?/，thus/ eas/ 发音特殊的单词：through/θru:/，throughout/θru:'aut/ 3．字母组合th在数词（包括基数词和序数词）中读清辅音/θ/。 例：three/θri:/，thirty/'θ?:ti/，thirteen/'θ?:'ti:n/，third/ θ?:d/，fourth/f?:θ/，fiftieth/'fiftiiθ/， thousand/'θauz?nd/，hundredth/'handr?dθ/ 4．除上述单词外，一般位于词首的th读/θ/。 例：theatre/'θi?t?/，thick/θik/，thin/θin/， throat/θr?ut/，theory/'θi?ri/，thrust/θrast/， thread/θred/，thorough/'θar?/，Thursday/'θ?:zdi/ 5．以th结尾的单词，th读清辅音/θ/。
例：truth/tru:θ/，worth/w?:θ/，breath/breθ/，both/b?uθ/，cloth/kl?θ/，pa th/pa:θ/，wealth/welθ/，length/le?θ/，strength/stre?θ/ 发音特殊的单词，例：smooth/smu:e/ 6．在复合词中，th的读音与在原词中的读音相同。 例：something / 'samθi?/，anything/'eniθi?/，nothing/'naθi?/ 还有前面提到的within，without等。 7．其他无规则可循的词分列如下： maths/m?θs/，arithmetic/?'riθm?tik/， clothing/kl?uei?/， clothes/kl?uez/，southern/'sae?n/，northern/'n?:e?n ／， worthy/'w?:ei/，author/'?:θ?/，sympathy/'simp?θi/
Quadratic Equations Let's glance at an example: The setup cost for the project to develop a new tank design is 50 thousand dollars. The development cost is a function of time. In other words, the cost increases with time. From previous contracts, the cost function is estimated to be t2 - 10 t where t is the time measured in working days. Suppose that a cost analyst has 650 thousand dollars allocated for the project, and he/she wants to know how long before he/she needs to allocate more resources to complete the project? Let's consider a solution
The total cost for the tank is equal to the sum of the initial cost and the development cost. t2 - 10t + 50 If $650 thousand has been given, we want to know how much time before more resources need to be allocated? t2 - 10t + 50 = 650 If we move 650 to the left of the equal sign, this is what we have t2 - 10t - 600 = 0 To solve the equation above, we just factor the terms as follows: (t + 20) (t - 30) The equation yields two answers: t = -20 and t = 30. Since negative time has no physical meaning, t = 30 is the only valid solution. Thus, it takes 30 working days before the cost analyst needs to allocate more resources to fund the project.
英语音标：字母组合th的读音规则总结1．在th后以字母-er结尾的单词中，th读浊辅音/J/。 例：altogether/&：lt+'geJ+/，farther/'fa J+/，feather/'fe J+/， whether/'we J+/，either/'ai J+/，gather/'g J+/ 2．一般情况下，在代词、冠词、介词、连词或副词中的字母组合th，读浊辅音/J/。 例：within/wi'Jin/，without/wi'Jaut/，these/Ji：z/，therefore/'>J#+f&：/，al-though/&：lJ+u/，those/ J+ uz/，the/ J+/，thus/ J)s/ 发音特殊的单词：through/Iru：/，throughout/'Iru：aut/ 3．字母组合th在数词（包括基数词和序数词）中读清辅音/I/。 例：three/Iri&：/，thirty/'I+：ti/，thirteen/'I+：'ti：n/， third/ I+：d/，fourth/f &：I/，fiftieth/'fiftii I/， thousand/'Iauz+nd/，hundredth/'h)ndr+dI/ 4．除上述单词外，一般位于词首的th读/I/。 例：theatre/'Ii+t+/，thick/Iik/，thin/Iin/，throat/Ir+ut/，theory/'Ii+ri/，thrust/Ir)st/，thread/Ired/，thorough/')r+/，Thursday/'I+：zdi/ 5．以th结尾的单词，th读清辅音/I/。 例：truth/tru：I/，worth/w+ ：I/，breath/breI/， both/b+uI/，cloth/kl&I/，path/pa ：I/，wealth/welI/， length/leRI/，strength/streRI/
一、如何区分th在英语单词中的发音 1. th位于词首时，可以从词性上判别其应有的读音。在名词、动词、形容词和数词中th发清辅音。如：thing, theatre, thunder, thermos, Thursday, theory, theme, throat, think, thank, , thicken, thirteen, thirty, third, thousand, thick, thirsty, 2. 在代词和一些功能词中th发浊辅音.如：them, their, theirs, there, the, than, then, though, therefore, they。只有介词through是个例外。 3. th位于词尾（或音节之尾）时，其读音多数是清辅音，如：bath, breath, tooth, 等。只有在少数单词中，如：with, smooth 中读浊音。 4. th在词中并且后面接er时，或者最后一个字母是不发音的e时，通常也发浊辅音。例如：feather, weather, whether, leather, further, father, bathe, breathe, southern, northern, either等。在其他情况下发清辅音。例如：faithful, method, nothing, anything, healthy, wealthy。 试读下列单词: mother, father, another, brother, health, wealth 二、如何区分单词后加“ed”后，这个ed怎么读 规则动词加ed后的发音：清念/t/ ,元浊/d/ ; /t/ /d/ 之后念/id/ 1、以清辅音结尾(不包括在词尾发音的t和d),加了-ed后,发/t/ .例：finished helped passed cooked 2、.以元音或浊辅音结尾的,加了-ed后,发/d/. 例：borrowed enjoyed called moved 3、结尾是发音的t或d,加了-ed后,发/id/. 例：wanted shouted needed counted 三、如何区分单词后加“s”或“es”后，这个单词的读音。 1、大多数动词在词尾加“S”在清辅音后发音为[s]，在浊辅音及元音后发音为[z]。 如：①stop－stops[s];make－makes[s]②read－reads[z];play－plays[z] 2、以辅音字母加“y”结尾的，要先将“y”变为“i”，然后在加“es”读[iz]如： fly－flies[z]；carry－carries[z] study－studies[z];worry－worries 3、以“s,x,ch,sh”结尾的，在词尾加“es”，发音为[iz]如： teach－teaches[iz];watch－watches[iz] 4、以“o”结尾的动词，加“es”，读[z]如：go－goes[z]do－does[z] 5. 以不发音字母“e”结尾的开音节词，如果尾音是[s]，[z]时，加“s”后字母“e”发 音，与所加“s”一起读做[iz]。如：close－closes[iz]
10. REACTION EQUATIONS Clicking the Reaction Equations button in the main menu shows the Reaction Equations Window, see Fig. 1. With this calculation option you can calculate the heat capacity, enthalpy, entropy and Gibbs energy values of a single species as well as of specified reactions between pure substances. See the reference state definitions, valid notations and abbreviations for the description of the chemical formulae in Chapter 28. Databases, chapter 2. 10.1 One Chemical Substance Fig. 1. Reaction Equations Window of HSC Chemistry.
Fig. 2.Thermodynamic data of A12O3 (alumina) displayed by the Reaction Equation option of HSC Chemistry. By entering a single chemical formula into the Formula box you will get similar tables of thermochemical data as presented in many thermochemical data books. HSC will, however, provide the results faster and exactly at those temperatures which you really want. Please follow these steps: 1.Write a chemical formula into the box, Fig. 1. For example: Fe, Na2SO4, Al2O3, SO4(-a), H(+a) or SO2(g). See the valid notation and syntax of chemical formulae in Chapter 21.2. 2.Select the lower limit, upper limit and temperature step. 3.Select the Temperature and Energy Units, by clicking the corresponding buttons. 4.Select the Format of the results. Normal (Absolute scale): H(species), S(species) and C(species) This format is used for example in the famous I. Barin, O. Knacke, and O. Kubaschewski data compilation1. Delta (Formation functions):
字母在单词中的发音 元音字母在单词中的发音 开音节 1）以发音的元音字母结尾的单节。例：be，he。 2）以辅音字母（r 除外）+不发音的e结尾的音节。例：make，like。 * 在重读的开音节中元音字母按字母名称读音。 闭音节 以一个或几个辅音字母（r 除外）结尾而中间只有一个元音字母的音节， 称为闭音节。例：map，desk，is。 * 在重读的闭音节中元音字母读做短元音。 Aa [ei] 在单词中的发音 1. 在重读开音节中发字母音[ei] a age able ache bake cake snake wake lake make take case cable age save base tape wave date race face name same game frame gate hate male pale sale taste shave shade race plane plate place page space safe slave state table stable stage skate paste trace trade waste (注意have[] ,ate []和vase的英国发音) 2. 在重读闭音节中发[?] at act ash bag bad bat cap cat can dad fact hand jam black thank rabbit glad chat van vat sad
3. 在非重读音节中发[?] a'go a'wake a'live a'lone a'long a'side a'board a'broad a'round a'bout a'bove a'ccept a'djust a'like American a'mount a'sleep a'ware a'way a'part 'panda 'cinema 4. 在重读-r音节中发[α:] car star start far arm army hard farm party card part pardon March farther farthest garden harvest market large apart parking (注意"[w]+ar" ,ar发[?:] warm war toward quarter [] ; 在非重读-r音节中发[?] 'sugar) 5. 在-re音节中发[e] care hare careful parent (注意are[α:] ) 6. 在重读闭音节中,"a+age"字母组合中,发[ei] dange dangerous strange stranger change exchange (注意orange [] ) 7. 在重读闭音节中,"a+ss, a+st, a+sp, a+sk, a+th, a+f, a+n" 中的a 发[α:] glass class classmate grass pass passer-by last fast past grasp ask mask basketball rather father after afternoon dance answer France plant can't 8. 在重读闭音节中,a前是w时,a常发[] want wash washer watch was (注意water [] ) Aa 的字母组合音节在单词中的发音
字母组合th的读音规则总结 现就中学英语课本中出现的含有字母组合th的单词，进行分类归纳，对其在单词中的读音总结以下几条。 1．在th后以字母-er结尾的单词中，th读浊辅音/e/。 例：altogether/?:lt?'gee?/，farther/'fae?/，feather/'fe e?/，whether/'we e?/，either/'aie?/，gather/'g?e?/ 2．一般情况下，在代词、冠词、介词、连词或副词中的字母组合th，读浊辅音/e/。 例：within/wi'ein/，without/wi'eaut/，these/ei:z/，therefore/'ee?f?:/，al-though/?:le?u/，those/ e?uz/，the/ e?/，thus/ eas/ 发音特殊的单词：through/θru:/，throughout/θru:'aut/ 3．字母组合th在数词（包括基数词和序数词）中读清辅音/θ/。 例：three/θri:/，thirty/'θ?:ti/，thirteen/'θ?:'ti:n/， third/ θ?:d/，fourth/f?:θ/，fiftieth/'fiftiiθ/， thousand/'θauz?nd/，hundredth/'handr?dθ/ 4．除上述单词外，一般位于词首的th读/θ/。 例：theatre/'θi?t?/，thick/θik/，thin/θin/，throat/θr?ut/，theory/'θi?ri/，thrust/θrast/，thread/θred/，thorough/'θar?/，Thursday/'θ?:zdi/ 5．以th结尾的单词，th读清辅音/θ/。 例：truth/tru:θ/，worth/w?:θ/，breath/breθ/，both/b?uθ/，cloth/kl?θ/，path/pa:θ/，wealth/welθ/，length/le?θ/，
Chapter 1 First-Order ODEs C C h h a a p p t t e e r r 22 S S e e c c o o n n d d --O O r r d d e e r r L L i i n n e e a a r r O O D D E E s s ((二二階階線線性性常常微微分分方方程程式式)) Chapter 3 Higher-Order Linear ODEs Chapter 5 Series Solutions of ODEs Chapter 6 Laplace Transforms ? Ordinary differential equations may be divided into two large classes, linear (線性) and nonlinear (非線性) ODEs. Where nonlinear ODEs are difficult to solve, linear ODEs are much simpler because there are standard methods for solving many of these equations. 22..11 H H o o m m o o g g e e n n e e o o u u s s L L i i n n e e a a r r O O D D E E s s o o f f S S e e c c o o n n d d O O r r d d e e r r ((二二階階線線性性齊齊性性微微分分方方程程式式)) ? A second-order ODE is called linear (線性的) if it can be written as ()()()y p x y q x y r x '''++=. (1) ? 線性：方程式的每一項都不得出現()y x 和其導數(y ', y '',…)的乘積或自乘 In case ()0r x =, the equation is called homogeneous (齊性的). In case ()0r x ≠, the equation is called nonhomogeneous (非齊性的). The functions ()p x and ()q x are called the coefficients of the ODEs. ? Theorem 1 Superposition Principle for the Homogeneous Linear ODE (適用於線性 齊性常微分方程式的疊加原理) If both 1()y x and 2()y x are solutions of the homogeneous linear ODE ()()0y p x y q x y '''++=, (2) then a linear combination (線性組合) of 1y and 2y , say 1122()()c y x c y x +, is also a solution of the differential equation. Proof –
字母组合th的读音规则 现就中学英语课本中出现的含有字母组合th的单词，进行分类归纳，对其在单词中的读音总结以下几条。 1．在th后以字母-er结尾的单词中，th读浊辅音/J/。 例：altogether/&：lt+'ge J+/，farther/'fa J+/，feather/'fe J+/， whether/'we J+/，either/'ai J+/，gather/'g J+/ 2．一般情况下，在代词、冠词、介词、连词或副词中的字母组合th，读浊辅音/J/。 例：within/wi'J in/，without/wi'J aut/，these/J i：z/，therefore/'>J#+f&：/， al-though/&：l J+u/，those/ J+ uz/，the/ J+/，thus/ J)s/ 发音特殊的单词：through/I ru：/，throughout/'I ru：aut/ 3．字母组合th在数词（包括基数词和序数词）中读清辅音/I/。 例：three/I ri&：/，thirty/'I+：ti/，thirteen/'I+：'ti：n/， third/ I+：d/，fourth/f &：I/，fiftieth/'fiftii I/， thousand/'I auz+nd/，hundredth/'h)ndr+d I/ 4．除上述单词外，一般位于词首的th读/I/。 例：theatre/'I i+t+/，thick/I ik/，thin/I in/，throat/I r+ut/，theory/'I i+ri/，thrust/I r)st/，thread/I red/，thorough/')r+/，Thursday/'I+：zdi/ 5．以th结尾的单词，th读清辅音/I/。 例：truth/tru：I/，worth/w+ ：I/，breath/bre I/，both/b+u I/，cloth/kl&I/，path/pa：I/，wealth/wel I/，length/le RI/，strength/stre RI/ 发音特殊的单词，例：smooth/smu：J/ 6．在复合词中，th的读音与在原词中的读音相同。 例：something / 's)m I i R/，anything/'eni I i R/，nothing/'n^)I i R/ 还有前面提到的within，without等。
字母组合th发音[e] 一、发音训练模块. that this these those they them father 那这这些那些他们他们爸爸 clothes the there then their with mother 衣服这那儿那时他们的带妈妈 二、短语训练模块。 this book that book this child these books those books these childen 三、句子训练模块（there be句型）。 四、阅读扩展训练模块（读句子）。 Good morning!My name is Zhang Li.I’m Chinese.I am in No 14 Middle School.I am a student(学生).I’m at school. My teacher is Miss Green.My mother is in No.14 Middle School,too.She is a teacher ,and she is a Chinese teacher. 根据短文内容判断下列句子的正(T)，误(F)。(10分)
( )1.My teacher is my mother. ( )2.It’s morning. ( )3.My mother and I are in the same(同样的)school. ( )4.My mother is an English teacher. ( )5.Zhang Li is at school. 五、口语训练模块。 1. --What time is it now? ----现在几点钟? -----It’s nine o’clock.It’s time for English class. 九点。该上英语课了。 -----It’s eight o’clock. It’s time to go to bed. 八点。该上床睡觉了。 2. --What day is it today? ----今天星期几? ----It’s Monday. ----星期一。 六、there be句子训练模块。
t h的发音规则22365
精品资料 辅音字符th清与浊的两种读音规则：一、当位于词首时，可以从词性上判别其应有的读音。 第一类：四种词类th读清音，即国际音标的/θ/： 1、Noun名词：thing, theatre, thumb大拇指, thunder雷, Thursday throat喉咙theory, theme主题 2、Verb动词：think, thank, throw,扔，投掷 3、Numeral数词：three, thirteen, thirty, third, thousand 4、Adjective形容词：thin, thick, thirsty, thorough彻底的 第二类：在以下两种词类th读浊音/e/： 1、Pronoun代词：they, them, their, theirs, this, these, that, those, there, 2、Functional terms功能词：the, than, then, though, thus, therefore 二、当位于词尾（或音节之尾）时： 1、多数是清音/θ/。如：bath, breath, both, cloth, tooth, health, wealth等。 2、少数单词读浊音/e/。如：with, smooth等。 三、当位于两个元音之间时： 1、多数是浊音/e/如：other, mother, brother, another, father, weather等。 2、也有读清音的/θ/ 如：method, nothing, anything, healthy, wealthy等。
t h的发音规则
辅音字符th清与浊的两种读音规则：一、当位于词首时，可以从词性上判别其应有的读音。 第一类：四种词类th读清音，即国际音标的/θ/： 1、Noun名词：thing, theatre, thumb大拇指, thunder雷, Thursday throat喉咙theory, theme主题 2、Verb动词：think, thank, throw,扔，投掷 3、Numeral数词：three, thirteen, thirty, third, thousand 4、Adjective形容词：thin, thick, thirsty, thorough彻底的 第二类：在以下两种词类th读浊音/e/： 1、Pronoun代词：they, them, their, theirs, this, these, that, those, there, 2、Functional terms功能词：the, than, then, though, thus, therefore 二、当位于词尾（或音节之尾）时： 1、多数是清音/θ/。如：bath, breath, both, cloth, tooth, health, wealth等。 2、少数单词读浊音/e/。如：with, smooth等。 三、当位于两个元音之间时： 1、多数是浊音/e/如：other, mother, brother, another, father, weather等。 2、也有读清音的/θ/ 如：method, nothing, anything, healthy, wealthy等。 注意：发出地道的“th”：将你的舌尖略微伸出嘴，上齿轻咬舌尖部位,气流通过舌齿间的缝隙，将音发出。要留一条缝隙，否则音发不出来。
Systems of Linear Equations 4 In this chapter direct methods for solving systems of linear equations A x =b. 1111 1.n n nn a a b A b a a bn ???? ? ???==???? ???????? Will be presented.Here A is given n n ? matrix. And b is a given vector. We assume in addition that A and b are teal. Althougn this restriction is inessen. Tial in most of the methods. In contrast to the iterative methods(Chatpte 8), the direct methods discussed here produce the solution in finitely many steps. Assuming computations without roundoff errors. This problem is closely related to that of computing the inverse 1A - of the matrix A provided this inverse exists. For if 1A - is known,the solution x of Ax=b can be obtained by matrix vector multiplication, x =1A -b.Conversely. the i th column i a of 1A -=(1,n a a ) is the solution of the linear system i Ax e =,where i e =T (0,,0,1,0,,0) is the i th unit vector. A general introduction to numerical linear algebra is given in Golub and van Loan(1983) and Stewart(1973). ALGOL programs are found in Wilkinson and Reinsch(1971), FORTRAN programs in Dongarra, Bunch,Moler, and stewart(1979)(LINPACH), and in Andersen et al.(1992)(LAPACK). 4.1 Gaussian Elimination. The Triangular Decomposition of a Matrix In the method of Gaussian elimination for solving a system of linear equations (4.1.1) ,Ax b = Where A is an n n ? matrix and n b R ∈. The given system (4.1.1) is transformed in steps by appropriate rearrangements and linear combinations of equations into a system of the form R x c =, 1110 n nn r r R r ?? ? ?= ?????? Which has the same solution as (4.1.1). R is an upper triangular matrix. So that R x c = can easily be solved by “back substitution ”(so long as 0,1,,ii r i n ≠= ): 1n i ik k k i i ii c r x x r =+-= ∑ for ,1,,1i n n =- . In the first step of the algorithm an appropriate multiple of the first equation is subtracted from all of the other equations in such a way that the coefficients of 1x vanish in these equations: hence. 1x remains only in the first equation. This is possible only if 110a ≠. Of course, which can be achieved by rearranging the equations if necessary. As long as at least one 10i a =. Instead of
辅音字符th清与浊的两种读音规则 一、当位于词首时，可以从词性上判别其应有的读音。 第一类：四种词类th 读清音，即国际音标的/θ/： 1、名词：thing, theatre, thumb, thunder, thermos, Thursday 2、动词：think, thank, throw, thrive, thicken, 3、数词：three, thirteen, thirty, third, thousand 4、形容词：thin, thick, thirsty, thoughtful, thorough 第二类：在以下两种词类th 读浊音： 1、代词：they, them, their, theirs, this, these, that, those, there, 2、功能词：the, than, then, though, thus, therefore 二、当位于词尾（或音节之尾）时。 1、多数是清音。如：bath, breath, both, cloth, tooth, health, wealth, 等。 2、少数单词读浊音。如：with, smooth等。 三、当位于两个元音之间时。 1、多数是浊音。如：other, mother, brother, another, father, weather等。 2、也有读清音的。如method, nothing, anything, healthy, wealthy等。 辅音字符th清与浊的两种读音规则 一、当位于词首时，可以从词性上判别其应有的读音。 第一类：四种词类th 读清音，即国际音标的/θ/： 1、名词：thing, theatre, thumb, thunder, thermos, Thursday 2、动词：think, thank, throw, thrive, thicken, 3、数词：three, thirteen, thirty, third, thousand 4、形容词：thin, thick, thirsty, thoughtful, thorough 第二类：在以下两种词类th 读浊音： 1、代词：they, them, their, theirs, this, these, that, those, there, 2、功能词：the, than, then, though, thus, therefore 二、当位于词尾（或音节之尾）时。 1、多数是清音。如：bath, breath, both, cloth, tooth, health, wealth, 等。 2、少数单词读浊音。如：with, smooth等。 三、当位于两个元音之间时。 1、多数是浊音。如：other, mother, brother, another, father, weather等。 2、也有读清音的。如method, nothing, anything, healthy, wealthy等。