英语专业四级词汇语法辅导从句

语法考点之一:虚拟语气考点1.If从句中的虚拟语气1、与过去事实相反：从句sｂｈad ｄoｎe，主句sb wouｌd(sｈoｕlｄ, ｃould, miｇht)＋hａvｅｄoｎe；2、省略ｉf,从句的语序用到装，即将ｗere,hａd或shoulｄ移至主语的前面，但否定词not不前移。

3、与将来事实相反：从句ｓb dｉd (ｓhoｕｌd+ｄｏ或were+tｏdo)，主句sb would (shoｕld，cｏuld, ｍight)＋do。

4、错综条件句：主句与从句的动作发生在不同的时间段。

比如：从句对过去虚拟，而主句对现在虚拟，即从句sb hａd dｏne,主句sb wｏulｄ(sｈoｕld, could, mｉght)+do;考点２：表示建议、要求、命令等动词如insisｔ,ｏrdeｒ，cｏmmaｎｄ, sｕｇgest, aｄvise, prｏpose, a ｓk，reqｕire, ｒｅｑuesｔ，ｄemａnd引导的从句及it引导的相应的分词、名词和形容词从句,谓语用(should)+动词原形。

考点３:Iｔis ＋advｉsable,eｓｓenｔiａl, importaｎt, iｍpeｒative，iｎcｒediｂｌe等从句，谓语用（should)+动词原形。

考点4：it is(ｈｉgh/abouｔ)tiｍe that的结构中，从句使用一般过去式。

例如:考点5：much aｓ"尽管，虽然"引导让步状语从句，从句中用ｗｏuｌd havｅdone表示假设。

考点6：if oｎlｙ, wish，as iｆ/as ｔhoｕgｈ引导从句，与过去事实相反:ｈad ＋ｄone；与现在事实相反:动词过去式;与将来事实相反:could/woｕld＋ｄo考点7：ｗｏｕld rather／ｓoｏｎer从句中使用一般过去式或过去完成式分别表示对现在或过去的虚拟考点８:ｌesｔ/ foｒfear that+(shｏulｄ) ＋原形动词。

语法考点之一：虚拟语气考点1. If从句中的虚拟语气1、与过去事实相反：从句sb had done，主句sb would(should,could,might)+ have done；1. I ___the party much more if there hadn’t been quite such a crowd of people there. 1996A. would enjoyB. will have enjoyedC. would have enjoyedD. will be enjoying2. All of us would have enjoyed the party much more if there ___ quite such a crowd of people there.2000A. weren’tB. hasn’t beenC. hadn’t beenD. wouldn’t省略if，从句的语序用到装，即将were,had或should移至主语的前面，但否定词not不前移。

3. Had Judy been more careful on the maths exam, she ____ much better results now. 2008A. would be gettingB. could have gotC. must getD. would get4. ______you were busy, I wouldn’t have bothered you with my questions. 1994A. If I realizedB. Had I realizedC. I realized thatD. As I realized5.___, he would not have recovered so quickly. 1995A. Hadn't he been taken good care ofB. Had he not been taken good care ofC. Had not he been taken good care ofD. Had he been not taken good care of6. ___for the fact that she broke her leg, she might have passed the exam. 2002A. Had it not beenB. Hadn’t it beenC. Was it notD. Were it not2、与现在事实相反：从句sb did(were)，主句sb would(should, could, might)+do；1. If there were no subjunctive mood, English _____ much easier to learn.2009A. could have beenB. would beC. will beD. would have been2. If you explained the situation to your solicitor, he ________ able to advise you much better than I can.2005A. would beB. will have beenC. wasD. Were3、与将来事实相反：从句sb did (should+do或were+to do)，主句sb would (should, could, might)+do。

专四必备语法一、时态、语态时态、语态需要掌握旳要点：1.体现未来时旳形式：(1)在时间、条件、让步从句中，一般目前时替代未来时，但要注意区别从句旳类型，如：I’ll tell him when you will ring again. 我告诉他你什么时候再来。

(宾语从句)比较：I’ll tell him when you ring again.你再打时我告诉他。

(状语从句)(2)在make sure, make certain, see (to it) 后旳that从句中，谓语动词用一般目前时替代未来时，如：See to it that you include in the paper whatever questions they didn’t know the answer to last time.(include 不能用will include或其他形式) 2.完毕时是时态测试旳重点，注意与完毕时连用旳句型和时间状语：(1)by/between/up to/till +过去时间、since、by the time/when +表达过去发生状况旳从句，主句用过去完毕时。

如：We had just had our breakfast when an old man came to the door.Between 1897 and 1919 at least 29 motion pictures in which artificial beings were portrayed had been produced.(表达1923年时已发生旳状况) (2)by +未来时间、by the time/ when +谓语动词是一般目前时旳从句，主句用未来完毕时。

如：By the time you arrive in London, we will have stayed in Europe for two weeks.I hope her health will have improved greatly by the time we come back next year.(3)by now、since +过去时间、in/during/for/over/the past/last few(或详细数字)years/days/months，主句用目前完毕时,如：The changes that had taken place in air travel during the last sixty years would have seemed completely impossible to even the most brilliant scientists at the turn of the 19th century.但在it is +详细时间since/before这一句型中，主句更多旳时候不用完毕时。

英语四级高级语法讲解：从句英语四级高级语法讲解：从句【复合句】：定语从句、名词性从句、状语从句。

一、定语从句：1. that，which，who的使用。

一个句子当中有两个相同的名词，将其中的一个名词进行替换，如果是人，用who;如果是物，用which;that既可以指人又可以指物。

2. 谓语动词(结构)和后面的介词有两种关系：关系紧密&关系疏远;定语从句中如果谓语结构和介词关系紧密，则介词必须保留在谓语结构的后面，不能做任何位置的改动;如果谓语结构和介词关系疏远，介词一般提到which/who/that的前面; 介词加which正好表示时间，可以表达成whe- n;表示地点时，可以表达成where;表示原因时，变成why;3. 限定性定语从句和非限定性定语从句。

限定性定语从句：定语从句和关系词关系非常紧密，删掉定语从句后，整个句子意思会改变;非限定性定语从句：定语从句和关系词关系不是很紧密，删掉定语从句后，整个句子意思不会改变，定语从句只起到补充说明的意义;eg: He won the first place in the competition, which is out of our expectation.② 非限定性定语从句：which引导非限制性定语从句只能放在后面，as则只能放在句子前面二、名词性从句：主语从句、宾语从句、表语从句及同谓语从句;形式：名词+从句;连接词取决于后面的从句是什么样的形式;如果是陈述句，直接加that引导;一般疑问句：先把一般疑问句变成陈述句语序，然后在其前加上weather或者if;特殊疑问句：直接保留特殊疑问词，后面的`句子变成陈述句语序;定义：在句子中起名词作用的句子，且在句子中能担任主语、宾语、表语、同谓语、介词宾语等成分;eg. Yuminhong, the president of New Oriental School.三、状语从句:两个独立的句子中间用一些含义不同的连接词连接;状语从句用来表达两个句子之间的逻辑关系;分成原因状语、条件状语、结果状语、时间状语、地点状语、让步状语、目的状语、比较状语、方式状语等九大类型;定语从句是名词+关系词+从句，关系词的用法取决于名词的问题;名词性从句：同谓语从句：名词+关系词+从句，关系词跟后面的从句有关系，如果是陈述句，直接加that引导;一般疑问句：先把一般疑问句变成陈述句语序，然后在其前加上weather或者if;特殊疑问句：直接保留特殊疑问词，后面的句子变成陈述句语序;宾语从句：动词+关系词+从句;表语从句：系动词+关系词+从句;主语从句：关系词+从句+谓语动词;名词性从句，其关系词的来源取决于后面的从句的性质。

英语专业四级语法常用句型语法是英语学习中非常关键的一部分，熟练掌握各种句型结构对于理解英语文本和表达自己的思想至关重要。

本文将介绍英语专业四级考试中常用的语法句型，帮助读者提高英语语法水平。

一、基本句型1. 主语 + 谓语 (Subject + Verb)- The cat sleeps. (猫睡觉。

)- He runs. (他跑步。

)2. 主语 + 谓语 + 宾语 (Subject + Verb + Object)- The dog chases the cat. (狗追逐着猫。

)- She loves him. (她爱他。

)3. 主语 + 谓语 + 宾语 + 宾补 (Subject + Verb + Object + Object Complement)- They made him captain. (他们让他成为队长。

)- We consider her reliable. (我们认为她可靠。

)4. 主语 + 谓语 + 宾语 + 宾语补足语 (Subject + Verb + Object + Object Complement)- We elected her class president. (我们选她当班长。

)- They named their baby David. (他们给他们的宝宝取名为大卫。

)1. 主语 + 谓语 + 宾语从句 (Subject + Verb + Object Clause)- I know that he is coming. (我知道他来了。

)- She believes what he says. (她相信他说的话。

)2. 主语 + 谓语 + 宾语 + 宾语补足从句 (Subject + Verb + Object + Object Complement Clause)- They made him realize that he was wrong. (他们使他意识到他错了。

专业英语四级重要知识点一、语法局部考察重点1、虚拟语气的考点为：would rather+that从句+一般过去时;It is vital/ necessary/ important/ urgent/ imperative/ desirable/ advisable/ natural/ essential+that+(should)动词原形; proposal/suggestion+that+动词原形;It is time/about time/high time+that+一般过去时;lest+that+should+动词原形;if only+that+would+动词原形。

2、状语从句的考点为：非if引导的条件状语从句，此类句子多用at times，provided，so long as，in case，once等来替代if;由even if/so，now that，for all等引导的让步状语从句;just/hardly...when引导的时间状语从句;more than，as...as，not so much as，the same as，as much as等引导的比拟状语从句。

3、独立主格构造多以规律主语+分词的形式消失。

4、情态动词多与完成时形式连用。

5、定语从句重点考察介词+关系代词(which)和as作为关系代词。

二、词汇局部考察重点1、动词、名词与介词的搭配如：popular/patient+with;yield/solution/adapt/transfer/access+to;ac cuse/require+of;charge+for;under+discussion等等。

2、习惯用法如：confess to/set about/be used to+doing;be supposed to/have/make sb.+do等。

3、由同一动词构成的短语如：come，go，set，break等构成的短语。

语法考点之一：虚拟语气考点1. If从句中的虚拟语气1、与过去事实相反：从句sb had done，主句sb would(should,could,might)+ have done；1. I ___the party much more if there hadn’t been quite such a crowd of people there. 1996A. would enjoyB. will have enjoyedC. would have enjoyedD. will be enjoying2. All of us would have enjoyed the party much more if there ___ quite such a crowd of people there.2000A. weren’tB. hasn’t beenC. hadn’t beenD. wouldn’t省略if，从句的语序用到装，即将were,had或should移至主语的前面，但否定词not不前移。

3. Had Judy been more careful on the maths exam, she ____ much better results now. 2008A. would be gettingB. could have gotC. must getD. would get4. ______you were busy, I wouldn’t have bothered you with my questions. 1994A. If I realizedB. Had I realizedC. I realized thatD. As I realized5.___, he would not have recovered so quickly. 1995A. Hadn't he been taken good care ofB. Had he not been taken good care ofC. Had not he been taken good care ofD. Had he been not taken good care of6. ___for the fact that she broke her leg, she might have passed the exam. 2002A. Had it not beenB. Hadn’t it beenC. Was it notD. Were it not2、与现在事实相反：从句sb did(were)，主句sb would(should, could, might)+do；1. If there were no subjunctive mood, English _____ much easier to learn.2009A. could have beenB. would beC. will beD. would have been2. If you explained the situation to your solicitor, he ________ able to advise you much better than I can.2005A. would beB. will have beenC. wasD. Were3、与将来事实相反：从句sb did (should+do或were+to do)，主句sb would (should, could, might)+do。