一． 指代時(shí)間、距離、自然現(xiàn)象等。
1. It is half past two now. (時(shí)間)
2. It is 6 miles to the nearest hospital. (距離)
3. It is very cold in the room. (溫度)
4. A lovely day, isn’t it? (天氣)
二． 指代前面所提到過(guò)的事物、群體、想法、性別不明或性別被認(rèn)為不重要的人或動(dòng)物、未指明但談話雙方都明白的事物或情況。
1. ①--- Who is knocking at the door?
--- It is me. (不明性別)
②--- Who is making so much noise?
--- It must be the children. (it 可以指復(fù)數(shù)名詞)
2. --- I’ve broken the plate.
--- It (= Breaking the plate) doesn’tmatter. (指前面所提到的事情)
3. The Parkers bought a new house but it willneed a lot of work before they can move in. (指雙方都明白的事情)
三． It 可以用作形式主語(yǔ)或賓語(yǔ)，而把真正的主語(yǔ)或賓語(yǔ)放在后面，真正的主語(yǔ)或賓語(yǔ)往往由從句、動(dòng)名詞、不定式充當(dāng)。
1. He found it not easy to learn a foreignlanguage well.
2. We think it no good reading in bed.
3. It is said that all of them have gone tothe cinema.
題組訓(xùn)練：
1. 我認(rèn)為開(kāi)這個(gè)會(huì)是必要的。____________________________________________
2. 勸他沒(méi)用。_________________________________________________________
3. 我們是否需要建一個(gè)實(shí)驗(yàn)室需進(jìn)一步討論。
_________________________________________________________________-___
四．It 可以用來(lái)替代整個(gè)句子或句中謂語(yǔ)部分所表示的意思。
1. He hates children, and it is strange.
2. ---- When can we come to visit you?
---- Any time you feel it.
五．熟記下列有關(guān)it的固定句型。
1. It+ takes/took (+sb 或其他某些抽象名詞)+ some time 或其它 + to do
eg:1) It will take us two hours to get thereby air.
2) It takes much patience to do the work.
2. Itis/was + adj/n + doing (這類(lèi)名詞、形容詞常見(jiàn)的有 no good, no use, uselessworth 等)
eg: Itis no use doing so.
3. Itis/was (about/ high) time + that 從句 （虛擬語(yǔ)氣）
eg: It’s time we went/ should gohome.
4. Itbe the first/second time + 從句 (用完成時(shí)) ( it 可換成this/that）
eg: --- Do you know our town at all?
--- No, it is the first time I havebeen here.
5. 用于 it doesn’t matter 或 Does it matter…? 句型
eg: 1) Does it matter if he can’t finishthe job on time?
2）---I’msorry I broke your mirror.
--- Oh, really? It doesn’t matter.
6. 用于 take it for granted + that 從句中 ：認(rèn)為…… 理所當(dāng)然
eg: We all took it for granted that hewould agree with us.
7. I takeit that you don’t agree with
8. I hateit when I have to speak in French on the phone.(討厭…)
9. I likeit when she sings a song for me. (喜歡…)
10. I can’thelp it if he is always late. (沒(méi)辦法)
11. I will appreciate it if you can help me. (感激…0
12. I don’t mind it if you are late. (介意…)
13. Please see to it that ( make sure that ) you bring enough money when yougo out.(確保)
14. You can count on it that he is very smart. ( 相信)
15. As someone puts it, practice makes prefect. ( 像…所說(shuō)的那樣)
16. You needn’t go if you don’t feel like it. (愿意)
17. Whenit comes to drive, she’s got more than any of us.(當(dāng)談?wù)摰?、涉及?/span>…)
18. You may depend on it that they are of much value. (相信…)
19. I makeit a rule to walk 3 miles a day. (固定)
20.① It is/ has been + 一段時(shí)間 + since + 句子 （did）
It was + 一段時(shí)間 + since + 句子 （had）
② It was/ will be + 一段時(shí)間 +before +句子 （ did/ do）
③ It is/was + 時(shí)間點(diǎn) + when +句子 （時(shí)間狀語(yǔ)從句）
④ It is/was + 時(shí)間狀語(yǔ) + that + 句子 （強(qiáng)調(diào)句）
六．It 用于強(qiáng)調(diào)句中
Itis/was +被強(qiáng)調(diào)部分（除謂語(yǔ)動(dòng)詞以外）+that +句子
Exercises:
1. I wasdisappointed with the film. I had expected_____ to be much better.
A that B those C them D it
2. Tom’smother kept telling him that he should work harder, but____ didn’t help.
A he Bwhich C she D it
3. Some companies havemade manufacturing of clean and safe products their main point andemphasize_____ in their advertising.
A them B why C how D it
4. Infact ____ is a hard job for the police to keep order in an important footballmatch.
A this B that C there D it
5. I don’tthink ____ possible to master a foreign language without much memory work.
A this B that C its D it
6. I hate____ when people talk with their mouth full.
A it B that C those D them
7. ---What was the party like?
---Wonderful. It is years_____ Ienjoyed myself so much.
A after B before C when D since
8. It isfive years ________ we saw each other last time.
A before B since C after D when
9. It wasthree o’clock ____ we finished the work.
A that B at which C when D since
10. Itwas not long _____ I forgot it all.
A then B when C after D before
11. Don’t __________that all those who get good grades in the entrance examination will prove to bemost successful.
A take as granted B take this for granted C take that for granted D takeit for granted
12. Ourclub is open to adults only. __________ your children have entered withoutpermission.
A There seems that B It seems to be C Thereseems to be D It seems that
13. Itwas about 600 years ago____ the first clock with a face and an hour hand wasmade.
A that B until C before D when
14. It was for thisreason _____ her uncle moved out of
A which B why C that D how
15. Manystudents in this school make____ a rule to come to the evening classes even onSundays.
A this B that C it D them
16. Iwould appreciate______, to be frank, if the goods could be delivered as soon aspossible.
A you B this C it D myself
17.---Why are you making so much noise?
--- I just can’t help_____.
A so B that C this D it
答案：DDDDD ADBCD DDACC CD
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