怎么处理高中英语单数可数名词的"秃头"现象?
名词分为可数名词和不可数名词。其中,可数名词就是能够用来计数的名词,前面一般要加冠词修饰。当然还有一些特殊情况是不需要冠词修饰的,下面就是关于这种情况的介绍。
高一英语语法:单数可数名词的"秃头"现象
单数可数名词在使用时,前面一般都要有不定冠词a(an)(表示类别),the,that,this(表示特指),或物主代词等。以下情况却在名词前不加这类词,"秃头"使用,同学们应多加注意。
1.表示某些机构或设施的名词以及home,town等名词前(常与at,in,to等连用,表示一般概念或抽象意义)。
例如:
The children go to school from Monday to Friday.
I don't think you can find it at home.
2.表示家庭成员的名词前(这些名词接近于专有名词的意义,第一个字母常大写)。例如:
Father was not at home till 5o'clock.
Mother is cooking at the kitchen.
3.表示呼语或感叹意味的名词前。例如:
Be careful,young man!It's dangerous.
Boy,come here and join us!
4.表示球类运动的名词前(与play连用时)。例如:
The students play football after school every Tues- day.
They like playing basketball and volleyball.
5.表示交通工具的名词前(常与介词by连用)。例如:
Some students in our class often go to school by bus.
We'll visit Shanghai this holiday by plane.
高一英语专题辅导:must, have to和have got to的区别
一、must的用法
1)表示主观的义务和必要, 主要用于肯定句和疑问句, 意思为 “必须……,得……,要……”;由must引起的疑问句,肯定回答要用must或have to, 否定回答要用needn’t或don’t have to, 意思是“不必”;must的否定形式mustn’t表示禁止,意思是“不能,不许”。如:
We must find a good method to learn computer well.
我们必须找一个学好电脑的方法。
—Must I finish the task right now?
我现在必须完成这个工作吗?
—Yes, you must. / Yes, you have to. 是的。
(—No, you needn’t. / No, you don’t have to. 不,不必。)
You mustn’t come here without permission. 未经允许,你不能来这儿。
2)表示肯定的猜测,常用于肯定句中,意思为 “一定是, 必然……”。
注意must表示推断或猜测的几种情况:
Your sister must be a doctor in this hospital. (现在的猜测)
你姐姐一定是这家医院的医生。
He must be reading newspapers in the reading room now.
(正在进行的猜测)
他此刻一定正在阅览室读报。
It must have rained last night, for the ground is wet. (过去的猜测)
昨晚一定下雨了,因为地面上是湿的。
二、have to / have got to 的用法
1)must表示一种主观的需要,而have to 表示一种客观的需要,意思是“不得不”。 如:
I have to attend an important meeting this afternoon.
今天下午我不得不参加一个重要的会议。
Mother is out, so I have to look after the shop.
妈妈不在家,因此我不得不照看商店。
2)have to 的否定形式是don’t have to, 相当于needn’t。如:
They don’t have to buy a computer at present.
他们目前没有必要买电脑。
3)have to 与have got to 常可以互换。
三、巩固练习:
从A、B、C、D四个选项中,选出可以填入空白处的最佳选项。
1. Mike, you ______ play with fire. You______ burn yourself.
A. won’t; can’t B. mustn’t; may
C. don’t have to; must D. have got to; shouldn’t
2. You ______ see the doctor, Joe. You don’t look very well.
A. must B. shall
C. may D. can
3. —Must I clean the window now?
—No, you ______.
A. mustn’t B. needn’t
C. can’t D. may not
4. Jack’s ill, so they ______ change their plans.
A. must B. should
C. have got to D. ought to
5. Harry has been reading all day —he ______ be tired.
A. should B. has got to
C. has to D. must
Key 1: 1-5 BABCD