八年级下英语第一单元语法.doc

一．情态动词should的用法
情态动词：是一类表示情态和语气的词，它有词义但词义不完全，不能单独做谓语，如：can (could), may (might), shall (should), will (would) ，need must，ought to
I must clean my bedroom before my mom goes back.
They can help you but they couldn’t do that.
You should keep your promise to learn English every day.
Should做情态动词
Should做情态动词，意思是应该、应当。常用来表示建议、劝告或命令。
I think you should lie down and rest.
What should i do?
You shouldn’t eat so much next time.
Young people should learn how to use computers.
Should的四种句型：肯定句、否定句、疑问句、特殊疑问句。
He should drink much water.
You shouldn’t eat anything bad.
Should i pay the taxi fare(计程车费）？
What should i do ?
Should的其他用法
（1） 委婉的表述自己的意见。I should think you are right.
（2） 表示情绪：如惊奇，赞叹，忧虑，委婉，欢喜。It’s unusual that it should be so hot.
表示推测：可能，应该。They should be home by now.
练习：
一、单项选择题
1. we go to visit the Great Wall tomorrow?
A.Shall B.Must C.May
2. 2. You should ____ more water when you have a fever.
A. drinks B.drunk C.drink
3.I can’t sleep, so I _____ listen to quiet music, and I ______ listen to exciting music.
A. should; should B. shouldn’t; shouldn’t
C. should; shouldn’t D. can; don’t
4.David ____ a stomachache. So he ____ eat anything 24 hours.
A. has, should B. has , shouldn’t C. have, shouldn’t D. had, shouldn’t
5.-I have a sore throat. What should I do?
You should drink hot tea _______honey.
A. of B. in C. with D. About.
二、 句型转换：
1. You shouldn’t eat anything for 24 hours.
You eat nothing for 24 hours.
2. You had better ask her for help.(否定句）
You had better ask her for help.
3. You should stay in bed for a day or two .(对划线部分提问）
you do？
二． 反身代词的用法：
反身代词用来强调动作执行者即主语的一类词:作用用来强调自身。
反身代词有：第一人称：myself ourselves
第二人称：yourself yourselves
第三人称：himself
Herself themselves
Itself
反身代词的用法
1.做宾语
My teacher told me a lot about herself. I walk to school by myself.
2. 常常和动词构成一些短语
Teach oneself 自学 dress oneself 自己穿衣 help oneself 自便
enjoy oneself玩得开心
口诀：反身代词表自己，动词介词后面做宾语，表示动作回自身。
练习题：
一、 单项选择题
1. Hi guys. How was your party yesterday?
Wonderful. We had a big meal and enjoyed .
A.themselves B.myself C.yourselves D.ourselves.
2. Jim, you could help to some soup.
A. himself. B.yourself C.herself D,myself.
3. We had a good time playing football last night.
We playing football last night.