内容正文:
模块语法精讲
can的用法
1、表能力。例如:
Can you sing ?你会唱歌吗?
2、表示可能性。例如:
We can go there by bus. 我们可以坐车去那儿。
3、表示同意做某事,意为"允许","可以"。例如:
Can I have a look at your photos?我可以看看你的照片吗?
4、表推测(主要用于否定句,疑问句)。 例如:
It can't be Jay Zhou. 他不可能是周杰伦。
must的用法
1、表示按命令,规定,责任等必须要做的事.
例如:You must do all the homework by yourself. 你必须独立完成所有的作业。
You mustn't park your car here. 你不能把车停在这儿。
在回答由must引导的一般疑问句时,如果表示肯定,用must;如果表示否定,要用needn't. 例如:
—Must I come here tomorrow? 明天我必须来吗?
—Yes, you must. (No, you needn't.)是的,必须来。(不,没有必要。)
2、表示肯定的推测,意为"一定会","一定是",多用于肯定句. 例如:
You must be joking. 你肯定在开玩笑。
must和have to 的区别
must表示说话人的主观意愿,而have to 则表示客观要求,意为"不得不".例如:
You must tell us what you have seen. 你必须告诉我们你看到的。
He had to walk home because the bus had left.因为车已经开走了,他不得不步行回家。
need的用法
need除了可用作行为动词外,还可用作情态动词,作为情态动词使用时,多用于疑问句和否定句,后面直接跟动词原形,作为行为动词
时,后面跟带to的动词不定式. 例如:
Does he need to see a doctor now他需要现在去看医生吗
need作为情态动词,意为"需要",无时态和人称的变化. 例如:
They needn't hand in their homework now. 现在他们没有必要交作业?
Need I stay with you? 我需要和你在一起吗?
(肯定回答为:Yes, you must. 否定回答用No, you needn't.)
had better的用法
had better(常简略为'd better)是一固定词组,had better"最好",用于表示对别人的劝告、建议或表示一种愿望。其用法有以下几点:
1、had better后面必须跟动词原形。
had better后跟动词原形(即不带to的不定式),构成had better do sth.句型。
这里的had不能用have来替换。例如:
You'd better go to hospital at once.你最好立即去医院看病。
2、had better的否定式。
常用的否定形式是将否定副词not直接放在had better的后面。例如:
You had better not miss the last bus.你最好不要错过末班公共汽车。
模块语法精练
I.单项选择
1.—Mum, may I watch TV now?
—Sure,but you ______help me with my English.
A. can B. may C. must D. could
2. —Can you go skating with us this afternoon?
—Sorry, I can't. I ______ take care of my little sister at home.
A. can B. may C. would D. have to
3. —Must I hand in my exercise book today?
—No, you______.
A. can't B. needn't
C. mustn't D. won't
4. —May I have a word with you?
—No, you______. I'm busy today.
A. needn't B. wouldn't
C. don't have to D. can't
5. —Who is the boy over there? Is it John?
—No,it ______be him. John is