译林版四下英语同步提优系列第五讲

第五讲

一、名词复数规则

1．一般情况下，直接加-s，如：book-books, bag-bags, cat-cats, bed-beds 2．以s. x. sh. ch结尾，加-es，如：bus-buses, box-boxes, brush-brushes, watch-watches

3．以“辅音字母y”结尾，变y为i, 再加-es，如：family-families, strawberry-strawberries

4．以“f或fe”结尾，变f或fe为v, 再加-es，如：knife-knives，leaf——leaves

5．不规则名词复数：

man-men, woman-women, policeman-policemen,

policewoman-policewomen,

child-children，foot-feet, tooth-teeth

fish-fish, deer-deer, sheep-sheep, people-people, Chinese-Chinese, Japanese-Japanese

【注】：

以字母o结尾的名词一般情况下加s,如：zoo-zoos,photo-photos.

只有极个别的名词加es.助记口诀：

黑人英雄爱吃西红柿土豆和芒果，有意思.

Negro hero tomato potato mango es

随堂练习：

1，写出下列各词的复数

I _________ him _________ this ___________ her ______

watch_______ child _______ photo ________ diary ______

day________ foot________ book_______ dress ______

tooth_______ sheep ______ box_______ strawberry _____

peach______ sandwich ______ dish_______ bus_______

man______ woman_______

二，动词第三人称单数形式的变化规则

1．一般情况下，直接加-s，如：cook-cooks, milk-milks

2．以s. x. sh. ch. o结尾，加-es，如：guess-guesses, wash-washes, watch-watches, go-goes

3．以“辅音字母 +y”结尾，变y为i, 再加-es，如：study-studies

随堂练习：

二．写出下列动词的第三人称单数

drink ________ go _______ stay ________ make ________ look _________ have_______ pass_______ carry ________ come________ watch______ plant_______ fly _________ study_______ brush________ do_________ teach_______ wash_______

三、句型转换方法

(1)含有be动词的句子；

1，句子分类(2)含有情态动词（can，must,should）的句子；

（3）含有行为动词的句子。

2，肯定句转换为否定句和一般疑问句的方法。

(1)含有be动词的句子：

肯定句否定句：直接在be动词后加not，可缩写。

肯定句疑问句：直接把be动词提到句首，其他照抄。

Mike is in the classroom now.

Mike isn’t in the classroom now

(2)含有情态动词的句子：

肯定句否定句：直接在情态动词后加not，可缩写。

肯定句疑问句：直接把情态动词提到句首，其他照抄。

Mike can speak English.

Mike can’t speak English.

(3)含有行为动词的句子：要借助于助动词do/does（根据原句主语的单复数决定.）

肯定句否定句：在动词前加do/does not，可缩写,后面的动词用原形，其他照抄。

肯定句疑问句：在句首加上Do/Does，后面的动词用原形，其他照抄。

3，肯定句转换为特殊疑问句的方法（考查题型：对划线部分提问）

【转换步骤：】

（1）根据划线部分内容确定用哪个特殊疑问词：

人——who/whom 事，物——what

地点——where 时间——when / what time

周几——what day 日期——what date

原因——why数量——how many

频率——how often 价钱——how much

颜色——what colour 年龄——how old

长度——how long距离——how far

还有how, which, whose等。

(2.)将剩余部分改成一般疑问句。（具体步骤同“肯定句转换为一般

疑问句”）

例：I go to the park on Sundays.

①Igo to the parkon Sundays.

What do you do on Sundays?

②I goto the parkon Sundays.

Where do you go on Sundays?

③Igo to the park on Sundays.

Who goes to the parkon Sundays?

④I goto the parkon Sundays.

When do you go to the park?

课后巩固练习：

一、将下列句子改成一般疑问句

1. I usually do my homework at eight. _______________________

2. We watch a football match everyday. ____________________

3. I’d like to go swimming. ________________________________

4. They are playing football in the playground.

_______________________

5. You should keep quiet in the library. ___________________________

6. She has some bread this morning. ________________________

7. His sister has some toys. _______________________________

8. I’m going to join a party this evening. ______________________

9. My mother can sing and dance. ______________________________

10. I am at home now. ______________________________

二、将下列句子改成否定句

1. They are in the bedroom. ________________________________