it的用法及强调句型

发布 2021-04-27 16:04:28 阅读 6285

高考英语核心语法学案:it的用法及强调句型。

it的用法。

一、it作指示代词。

完成句子】用one,ones,it,that,those填空。

(1) —i can't find my watch.

— you h**en't found __if you want to buy a new __i suggest you buy __made in china.

(2) we've got a big cup and two small __

(3) the weight of an elephant is much greater than __of a tiger.

4) the books on the first shelf are easier than __on the second shelf.

5) the boy told his story and __of the girl upstairs.

答案】 (1) it; one; one2) ones3) that

(4) those / the ones (5) that / the one

结论1】①指代上文提过的事物时,it指的是同名同物,相当于the+名词;

②one指的是同名异物,表示单数可数名词相当于a +名词;a / an+形容词+one等于a / an+形容词+名词;复数形式用ones;

③that后面常有后置定语,有特指意义,代替不可数名词或单数可数名词,相当于the+名词;

④复数名词用those,相当于the ones。

例句观察】— someone is knocking at the door. who is it?

— it must be leo. he said he'd come to see me.

结论2】it指代人时,常指小孩或身份不明的人。

例句观察】it's too quiet in the room. everyone just keeps silent.

结论2】it可用以指代环境或情况。

完成例句】 [

根据语境补全句子。

(6)— what time is it now?

it's half past seven.

(7)— it is spring now and it's warm these days.

结论4】 it可用以指代时间、季节、天气或距离。

注意】 it指代时间时,有如下一些句型:

(1) it is time for sth. (for sb.)to do sth. /that-从句(should do / did, 必须用虚拟语气)

例: ①it's time for lunch.

it's time for us to clean the house.

it's time that we should clean the house.

it's time that we cleaned the house.

(2) it is / has been + some time + since-从句 (从句用一般过去时)

(3) it / this is the first / second…time that-从句(必须使用现在完成时)

这是某人第……次做了某事。

it / that was the first / second…time that-从句(必须使用过去完成时)

例:①it is the second time that she has visited the great wall.

②this was the first time that i had come late to school.

4) it was +时间点 + when -从句。

例: it was evening when we got home.

=it was evening in which we got home.

5) it was / will be + some time + before -从句。

例:①过了5年他们才从北大毕业。

it was five years before they finally graduated from beijing university.

②不久,我们就要从我们学校毕业了。

it won't be long before we graduate from our school.

二、it作形式主语。

完成例句】根据语境补全句子。

(8) it is possible for me to make a tour around the world.

结论】代替由不定式、动名词或从句所表示的真正主语。为平衡句子,通常把不定式作主语改为it 作形式主语。

三、it作形式宾语。

例句观察】①how did it come about that so many people were attacked?

② she feels it hard to get in touch with her old friend.

③ mobile phones make it possible for us to keep in touch anywhere.

④ i h**e made it a rule to get up early.

结论1】①it可以用在某些固定句型中,例如:

how did it come about that-从句意为“……怎么发生的?”

②it 作形式宾语常用结构有:代替由不定式、动名词或从句所表示的真正宾语。常见结构有:

主语+ think / consider / find / feel / make / believe / regard +it+adj. /n. (for sb.

)to do.

例句观察】i consider it no good chatting with strangers through the internet.

结论2】主语+ think / consider / find / feel +it+ no good / use doing sth.

例句观察】[

i hate it when people speak with their mouths full.

结论3】主语+hate / dislike / love / like +it + when-从句,表示对某一情况的喜好或厌恶。

例句观察】i really appreciate it if you could help me with my math.

结论4】主语+appreciate + it+ if-从句。

例句观察】

①you must see to it that the doors are locked before you le**e the lab.

②you can depend upon it that we won't give up.

③i answer for it that she is an honest girl.

结论5】主语+see to / answer for it+ that-从句(确保……)

主语+depend on it +that-从句(指望,确信……)

四、带it的一些固定词组。

1.(you've / i've) got it. 懂了,明白了。

2. forget it. 算了吧,别在意,没关系。

3. take it easy 别着急,慢慢来;别过于紧张。

4. make it 办得到,做成功。

5. make it +时间把……定在(某时)

6. it / that (all) depends. 那要看情况而定。

7. it can't be helped. 没有办法。 /这是不可避免的。

8. it is hard to say. 情况很难说。

9. it comes to nothing. 没有什么结果。

10. don't mention it. 不用谢。

11. that's it. 对了;正是。

12. catch it(口语)被责骂; 受处罚。

13. believe it or not. 信不信由你。

14. it doesn't matter. 没有关系; 不要紧;

15. when it comes to…当谈到……;当涉及……

16. keep it up. 再接再厉。

强调句型。一、强调句型的基本用法。

1.强调句结构:it is / was + 被强调部分+that+ 句子的其余部分。

2.句型解读:[z|xx|

(1) it是引导词,强调的内容可以是句子的主语、宾语、状语。如果被强调的部分是人,that 可用who代替,其他情况一律用that。

(2) 验证强调句的方法: 去掉it is / was…that 结构后,可以把被强调的部分与句子其余部分还原为一个完整的句子。

二、强调句型的考点。

例句观察】(1) it was edison who invented the lamp.

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