四年级下册一般现在时.doc

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 every 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.
4．They all __________(喜欢)English teacher.
5．Jack often __________(睡觉)at ten.
6．Do they __________ __________(吃晚饭)at home?
7．We often__________(跳舞)in music class.
8．A chair__________(有)four legs.

（四）.用适当的动词形式填空.
(1) Wang Xin usually_________(get) up at 6:30. He________(get) up now .
(2) Meihua usually_________(clean) his bedroom on Sunday. Now it’s nine o’clock. He_________(clean) his bedroom.
(3) Bill_________(not like) skipping. He_________(like) running.
(4) My mother_________(make) noodles on Sunday. She_________(not make) pasta.
(5) -_________ your sister_________(like) coffee? -No, but she_________(like) tea.
(6) The bird sometimes_________(fly) high.
(7) Today_________(be) my 12th birthday. My grandmother _________(give) me a doll.
(8) The girl usually_________(plant) many plants in the spring every year.
(9) Our music teacher_________(teach) us music on Monday afternoon.
(10) He usually_________ (water) them in the morning.
(11) He always_________(clean) slowly and ________(look) left and right
(12) The young lady_________(clean) her bedroom every afternoon.
(13) She never_________(go) to school late, and she always _________(do) well in class.
(14) Usually, Tom _________(water) them two times a day.
(15) May usually_________ (plant) many trees in spring.

(五).仿照例句, 写出下列动词的形式.
例: sing sings singing
(1)cut____________ _____________ (2) catch_____________ ____________
(3)swim____________ ____________ (4) take_____________ ____________
(5)get____________ _____________ (6) run___________ _____________
(7)ask___________ ______________ (8)brush_____________ ____________