初二下学期英语知识点总结

英语一直是很多初中生的薄弱科目，很多学生都觉得到了初二下学期，英语知识的学习难度增加了。下面是本站小编为大家整理的初二下学期英语知识，希望对大家有用!

1、 Will

1)表意愿，用于各种人称陈述句。I will do anything for you. 我愿为你做任何事。 None is so blind as those who won't see. 不愿看的人眼最瞎。

If you will read the这本书，我会把它借给你。

2)表请求，用于疑问句。

Will you close the window? It's a bit cold. 请你把窗户关上好吗?有点冷。 Won't you drink some more coffee? 再来一点咖啡好吗?

3)表示某种倾向或习惯性动作。

Fish will die out of water. 鱼离开水就不能活。 The door won't open. 这门打不开。

The boy will sit there hour after hour looking at the traffic go by. 那男孩常常坐在那里好几个钟点，看着车辆行人通过。

2、Should

1)表义务。意为

You should be polite to your teachers. 你对老师应该有礼貌。You shouldn't waste any time. 你不应该浪费时间。

2)表推测，意为

The film should be very good as it is starring first-class actors. 这部新电影是一流演员主演的，估计拍得很好。They should be home by now. 照说他们现在应当已经到家了。

3、Would

1)表意I said I would do anything for you. 我说过我愿意为你做任何事。

2)表委婉地提出请求、建议或看法。Would you like another glass of beer? 再来杯啤酒好吗?

Would you mind cleaning the window? 请把窗户擦一下好吗?

They wouldn't have anything against it. 他们不会有什么反对意见。

3)表过去反复发生的动作或过去的一种倾向。Every time she was in trouble, she would go to him for help. 她每遇到麻烦都会向她求助。他告诉我盒子打不开了。

4、ought to

1)表义务，意为

2)表推测，暗含很大的可能，语气较弱。

Han Mei ought to know his telephone number. 韩梅该知道他的电话号码。

There's a fine sunset; it ought to be a fine day tomorrow. 今天有晚霞，明天应该是个好天。

5、 used to 表示过去的习惯动作或状态，现在不复发生或存在。疑问式和否定式有两种。

He used to live in the countryside, but now he lives in the city.他过去住在乡下，现在住在城里。

There used to be a building at the street corner, bn. 街道拐角处过去有座楼房，现在拆了。

I usedn't (didn't use) to smoke. 我过去不抽烟。

Used you (Did you use) to go to school on foot? 你过去常步行去学校吗?

(一)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)

(二)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?

1. How often do you exercise? 你(你们)多久锻炼一次身体?

How often + 助动词do(does或did) + 主语 + do sth.? 疑问词how often是问频率(多久一次),(在这里助动 词do(does或did) 是起帮助构成疑问的作用)与一般现在时或一般过去时连用，回答一般是用表示频率的副词

如：once, twice, three times„, sometimes, often, quite, often, never, every day, once a week , twice a month , three times a month , three or four times a month 等。

2、 Mom wants me to get up at 6:00 and play ping-pong with her . want to do sth. 意思是“想要做某事”; want sb. to do sth.意思是“想要某人做某事”。

3、 She says it‘s good for my health.

be good for...表示“对„„有益(有好处)”;其反义为：be bad for...。(这里for 是介词，后跟名词、代词或动名词)

4、I try to eat a lot of vegetables , usually ten to eleven times a week .

try to do sth.表示“ 尽力做某事 ” ，不包含是否成功的意思而try doing sth.表示“(用某一办法)试着去做某事”。

5、 That sounds interesting.

这是“主语+系动词+表语”结构的简单句。sound(听起来)，look(看起来)，smell (闻起来)，taste(尝起来)，feel(觉得)，seem(好象)，grow(变得),get (变得)等词在英语中可用作系动词，后跟形容词作表语。

6、It’s easy to have a healthy lifestyle, and it’s important to eat a balanced diet.

7、 forget to do sth. 忘记要做某事 forget doing sth. 忘记做过某事

8、. doing sth. takes sb. Some time/ money

=It takes sb. some time/money to do sth.=sb. spends some time/money (on sth.)

=sb. spends some time/money (in) doing sth.=sth. costs sb. some time/money

=sb. pay some money for sth.花费某人多少时间/金钱做某事/某人花费多少金钱/时间做某事

9、it’s easy to do sth. 做某事容易 it’s hard (difficult) to do sth.做某事难， It’s necessary to do sth.做某事必要