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.
someone is knocking at the door. who is it?
it must be leo. he said he'd come to see me.
it's too quiet in the room. everyone just keeps silent.
根据语境补全句子。
6)— what time is it now?
half past seven.
7spring now and it's warm these days.
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.
this 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。
二、it作形式主语。
8is possible for me to make a tour around the world.
三、it作形式宾语。
how did it come about that so many people were attacked?
she feels it hard to get in touch with her old friend.
mobile phones make it possible for us to keep in touch anywhere.
i h**e made it a rule to get up early.
i consider it no good chatting with strangers through the internet.
i hate it when people speak with their mouths full.
i really appreciate it if you could help me with my math.
you must see to it that the doors are locked before you le**e the lab.
you can depend upon it that we won't give up.
i answer for it that she is an honest girl.
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。
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：(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。
1) it was edison who invented the lamp.
2) it is edison who invents the lamp.
it is i that am your english teacher.
he didn't go to bed until he finished his homework. (对画线部分进行强调)
it wasn't until he finished his homework that he went to bed. (强调句)
was it not until he finished his homework that he went to bed?
when was it that he went to bed?
i really don't know when it was that he went to bed.
疑难】it is in the city where he was born that he works.
他工作的地方是他出生的那个城市。
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