一般现在时、一般过去时、一般将来时

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教学内容

知识点一:一般现在时

【知识梳理】

(1) 一般现在时的基本结构和变化

1. 一般现在时的结构 ① be 动词:主语 +be(am, is, are)+ 其它。 e.g. I am a boy. 我是一个男孩。

②行为动词:主语 +行为动词 (+ 其它 ) 。一般现在时主要用动词的原形表示,如果主语是第三人称单数,则在动词原形后加 "-s" 或 "-es" e.g. He gets up early in the morning.

2. 否定句和疑问句的变化 ① be 动词的变化:

A. 否定句:主语 + be + not + 其它。 He is not a worker. 他不是工人。 B. 一般疑问句: Be + 主语 +其它。 ---Are you a student? ---Yes. I am. / No, I'm not. C. 特殊疑问句:疑问词 +一般疑问句。 Where is my bike? ②行为动词的变化: A. 否定句:主语 + don't( doesn't ) + 动词原形 (+ 其它 ) 。 I don't like bread. / He doesn't like bread.

B. 一般疑问句: Do ( Does ) + 主语 +动词原形 +其它。 ---Do you often play football? --- Yes, I do. / No, I don't. --- Does she go to work by bike? --- Yes, she does. / No, she doesn't. C. 特殊疑问句:疑问词 +一般疑问句。 How does your father go to work? (注意回顾动词第三人称单数形式变化规则)

一般情况下在词尾加 s help → helps, clean →cleans, play → plays, wear → wears, give → gives; 以 s,

x, ch, sh 结尾的动词在词尾加 es dress → dresses, fix →fixes, watch → watches, finish → finishes; 以

“辅音字母加 y”结尾的动词,把 y 变为 i ,再 study → studies, carry → carries, fly → flies )

(2) 一般现在时的用法

1. 表示经常性或习惯性的动作或行为。常与 always, sometimes, often, usually, never 等副词连用。

e.g. I go to school every day except Saturdays and Sundays. My mother often gets up

at 6 o ’clock.

2. 表示现在的状态,能力,性格,个性。 e.g. My father teaches maths. Lin Yan dances well.

3. 表示普遍真理或客观事实。 e.g. The earth moves around the sun. The sun rises in the east. 【注意】此用法如果出现在宾语从句中,即使主句是过去时,从句谓语也要用一般现在时。如:Our physics teacher said that light travels much faster than sound. 我们的物理老师说光的传播速度比

声音的传播速度快得多,在时间、条件、比较等状语从句中, 用现在时表示将来的动作,从句的谓语动词用 一般现在时。

如: I will e-mail you as soon as I get to Beijing. 我一到北京就给你发邮件。 If you come this afternoon, we will have a meeting. 如果你今天下午能来,我们就开会。

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【例题精讲】

例 1. —— Who is that lady?

—— She’ s Miss Green. She ____ us music, and she is so good.

A. taught B. teaches C. will teach D. is teaching

例 2. —— I think I ’ ll take a bus to the meeting.

—— The bus? If you ____, you will be late.

A. do B. have done C. will do

例 3. Unless the weather ____, we will have to cancel the picnic.

A. improve B. improves C. improved D. will improve

例 4. We don’t know if our friend ____. If he ____, we ’ ll let you know.

A. comes; comes B. comes; will come C. will come; comes

例 5. Our geography teacher told us that the earth ____ the sun.

A. went around B. goes around C. is going around D. was

going around

【课堂练习】

1. Look! A dog ____ a blind man across the road.

A. leads B. lead C. is leading D. led

2. They usually ____ TV in the evening.

A. watch B. will watch C. are watching D. watches

3. He hardly ____ up early .

A. gets B. get C. doesn ’ t get D. don ’ t get

4. John ____ football.

A. likes playing B. likes play C. like play

5. Frank usually ____ in touch with his primary school teachers by email.

A. keep B. keeps C. kept D. will keep

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知识点二:一般过去时

【知识梳理】

(1) 一般过去时的基本结构和变化

1. 定义:表示过去某时发生的动作或存在的状态。

2. 结构:“主语 + 动词的过去式”

3. 句型转化:

①be 动词的过去时的句型如下:

A. 否定句: 主语 + be 动词的过去式( was, were ) + not ⋯

B. 疑问句: be 动词的过去式( was, were ) + 主语 ⋯?

a. He was busy yesterday. ( 肯定句 ) 他昨天很忙。

b. He was not busy yesterday. ( 否定句 ) 他昨天不忙。

c. Was he busy yesterday? ( 疑问句 ) 他昨天忙吗?

d. There weren ’ t any boys in the room. 房间里没有男孩儿。

e.g. There weren ’t any boys in the room. 房间里没有男孩儿。

Were there any boys in the room? 房间里有男孩儿吗?

②行为动词的否定式和疑问式:

A. 否定式:行为动词前加上 did not 或缩略式 didn ’ t, 并把这个行为动词改为动词原形。 a. I called Lin Tao yesterday afternoon.

→ I did not / didn ’ t call Lin Tao yesterday afternoon. b. I borrowed a book from Sun Yang last Sunday.

B. 一般疑问式:若在陈述句中只有行为动词的过去式 , 那就得在句首加上一个助动词 did 来帮助提问 ,

然后把句中的行为动词由过去式改为动词原形 , 并在句末打上问号。回答时别忘了还用 did 。 a. We stayed there for 10 days last month.

→ Did you stay there for 10 days last month? Yes, we did. / No, we didn ’ t.

b. Mary had a delicious dinner yesterday evening.

→ Did Mary have a delicious dinner yesterday evening? Yes, she did. / No,

we didn ’ t.

(2) 规则动词的变化

一般情况下,直接在动词词 watch → watched

尾加 -ed 。 plant → planted

过去式(规则变化) 以不发音字母 e 结尾的动词 like → liked

在词尾加 -d 。 move → moved

以“辅音字母 + y ”结尾的 study → studied

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