四年级下册一般现在时

一般现在时

一般现在时的用法

(1) 表示经常发生或习惯性发生的动作时，用一般现在时态。如：I often watch TV at home.

(2) 表示客观的事实，用一般现在时态。如：There are seven days in a week.

一般现在时的构成

当句子主语是I, we, they, you或复数名词时，动词用动词原形。

当句子的主语是he, she, it或单数名词时，动词要用第三人称单数的现在式形态。

具体讲解：

特别注意特征词( often usually always sometimes never seldom every+时间) 在句子中的标志作用，在做练习时最好把他们标记出来。

例子：She usually does her homework after dinner.

注意区分好人称，第一，二人称和第三人称复数只需要用动词原形，他们的否定形式是“don’t+动词原形”，他们的疑问形式为“Do…+动词原形…?”如果是第三人称单数就要作动词的变化。例子：They go to work by bus on weekdays.

They don’t go to work by bus on weekdays.

Do they go to work by bus on weekdays?

对于句子中的“doesn’t+动词原形”及“Do…+动词原形…?”分别是否定和一般疑问句的形式，一旦遇见“doesn’t” “do”这两个词时，动词必须还原。

The girl likes eating fruits very much.

The girl doesn’t like eating fruits at all.

Does the girl like eating fruits?

1. 标识词，特征词：often usually always sometimes never seldom every+时间

2. 构成：

主语是一(I/we).二人称(you) 及复数形式(they)：人/物+动词原形

例子：I/We often go to school on time every day.

否定形式：…don’t + 动词原形

例子：I/We don’t often go to school on time eve ry day.

提问：Do…+动词原形…? Yes,…do. No,…don’t.

例子：Do you often go school on time every day?

Yes, I do. No, I don’t.

第三人称单数（he/she/it以及一个人/物）：

人/物+动词未尾+“s”或“es”

例子：a. He/She usually goes to school by car every day.

b. Janet/Ben has lunch at 12:00 every day.

c. The cat eats a fish every day.

3. 动词的变化：动词末尾+ “s”或“es”

（1）一般情况下，在动词后面+s，如：look---looks eat---eats

（2）以“s”，“x” “sh” “ch” “o”结尾的单词在词尾+“es”，如：watch---watches wash---washes

catch---catches teach---teaches （3）以辅音字母+“y”结尾的单词，把“y”改为“i”再+“es”,如：fly---flies carry---carries

try---tries

（4）特殊形式：have---has

4. 否定形式：…doesn’t+动词原形

例子：The old man plays chess in the morning.

The old man doesn’t play chess in the morning.

5．提问：Does…+动词原形…? Yes,…does. No,…doesn’t.

例子：Does the old man play chess in the morning?

Yes,he does. No, he doesn’t.

巩固练习

选择正确的答案填空，将其字母编号写在题前的括号内。

（）1. My mother_______ housework every day.

A. did

B. do

C. does

（）2. The lion doesn’t______ the net three times a day.

A. bited

B. bite

C. biting

（）3. He______ a big hole every week.

A. makes

B. is making

C. made

（）4.Does the cat______ a mouse every hour?

A. catch

B. catching

C. catches

（）5.He usually_______ the earth to the hill.

A. carry

B. carries

C. carrys

（）6. My mother always_______ up at half six.

A. got

B. get

C. gets

（）7. She often_____ under a big tree and _____ books in the morning.

A. sit…reads

B. sits…read

C. sits…reads

（）8. ______ the boy ______ TV on weekdays?

A. Do…watches

B. Does…watch

C. Do…watch （）9.Their friend______ to the park every two days.

A. go

B. goes

C. going

（）10.He never______ a lot of water after he_____ football.

A. drinks…play

B. drinks…plays

C. drink…plays （）11. ____your mother _____ a car to get there every day?

A. Does…drive

B. Do…drive

C. Do…drives

（）12. He seldom______ anything.

A. forget

B. forgot

C. forgets

（）13. She often______ over when she______ the baton.

A. falls…gets

B. falls…get

C. fall…gets

（）14.Janet______ the dog every morning.

A. feed

B. feeding

C. feeds

（）15.My father_______ well in the evening every day.

A. doesn’t feel

B. don’t feel

C. doesn’t feels （二.在下面的动词后加-s或-es .

(1) catch_________ (2) go_________ (3) cost_________

(4)fish________ (5)listen_________ (6)do____________

(7) fall________ (8)show__________ (9)brush__________ （三. 翻译。

1．I often __________ __________(看电视)in the evening.

2．Jack __________ __________(踢足球) every afternoon.

3．Jane _______ _______(购物)with her mother on the weekend.