need和dare的用法

need和dare既可用作情态动词，也可用作实义动词。用作情态动词时，主要用于否定句和疑问句。用作实义动词时，可用于各种句式。

1.用作情态动词--Need I come? --Yes, you must. --我需要来吗? --需要。 You needn't telephone him now. 你现在不必打电话给他。

I don't think you need worry. 我想你不必发愁。

She dare not go out alone at night. 她晚上不敢一个人出去。

How dare you say I'm unfair? 你竟敢说我不公平?

Not one of them dared mention this. 他们谁也不敢提这件事。

2.用作实义动词You don't need to do it yourself. 你不必亲自做这件事。 We need to tell them the news. 我们需要把这消息告诉他们。

The table needs painting (to be painted.). 桌子需要油漆一下。

We should dare to give our own opinion. 我们要敢于提出自己的观点。

He did not dare (to) look up. 他不敢抬头看。

I dare day he'll come again. 我想他会再来的。(I dare say…为固定习语)

情态动词后跟完完成这项工作的

He isn't here. He must have missed the train. 他还未到，一定是没赶上火车。 Where can (could) he gone? 他能到那里去了呢?

You may (might) have read about it. 你可能在报上已经读到这件事了。 You could (might) have been more careful. 你本来可以更细心的。

He needn't have worried it. 他本不必为此事担心。

There was a lot of fun at yesterday's party. You ought to have come, but why didn't you? 昨天的聚会非常有意思。你本应该来，为何不来呢?

可数名词变复数

可数名词变复数时，有规则变化和不规则变化两种。

1、规则变化：

1)一般情况直接在词尾加“-s ”，如：cake-cakes, bag-bags, day-days, face-faces, orange-oranges等;

2)以s, x, sh, ch结尾的词，要在词尾加“-es ”，如：bus-buses, watch-watches, box-boxes等;

3)以辅音字母加y结尾的词，变y为i再加“-es ”，如：baby-babies, country-countries, family-families等;

4)部分以f (e)结尾的词，变f (e)为“ves ”，如：knife-knives, half-halves等;

5)以o结尾的词，加“-s ”或“-es ”，如：zoo-zoos, photo-photos, tomato-tomatoes, potato-potatoes等。记忆口诀：除了“英雄”hero外，凡是能吃的，加“-es ”，不能吃的加“-s ”。

2、不规则变化：

1)改变单数名词中的元音字母：man-men, woman-women, foot-feet, tooth-teeth等;

2)单、复同形：sheep-sheep, Chinese-Chinese, Japanese-Japanese等;