这个句型中，it指时间，而且表示时间的词语前没有介词（时间一般是具体时间）。
主句和从句中的谓语动词在时态上是一致的，主句是will be，when从句用一般现在时代替将来时。
e.g. It was already 8 o’clock when we got home.It will be late afternoon when they get there.4）It be +时间+ that-clause这个句型是个强调句型。
e.g. It was at 5 o’clock that he practiced playing the violin in the morning.(原句是：He practiced playing the violin at 5 o’clock in the morning.)比较：It was 5 o’clock when he started in the morning.（5 o’clock前没有介词，这个是定语从句）5）It be + time + that-clause这个句型属虚拟语气结构，不管主句中用的是is或was，that从句都须用动词的过去式或should+动词原形（但不及物动词通常用过去式），在time之前有时可以加上high或about以加强语气。
e.g. It is high time (that) he wrote a letter to his girlfriend.It is time (that) we made people’s life a little easier. = It is time that we should make people’s life a little easier.9、It/This/That + be + the first(second, third…) time + that-clause这个句型表示截止到说话时为止的某人的一种经历，关键是注意time前有序数词，主句是一般现在时is时，从句要用现在完成时；如果主句用一般过去时was时，则从句须相应地用过去完成时。
e.g. This is the first time (that) these Europeans have visited the Great Wall.It was the fifth time (that) I had paid a friendly visit to America.10、在一些相对固定的词组中，没有特殊含义，经常不翻译。
e.g. He’s never really made it as an actor.作为演员，他从未获得过真正的成功。
It is my turn.轮到我了。
三、课堂作业单选题：1. It was this village ___ I was brought up.A. whereB. thatC. on whichD. which2. It was in this village ___ I was bought up.A. whereB. thatC. on whichD. which3. Can it be in the drawer ___ you put your passport?A. whereB. in whichC. thereD. that4. It was July 1, 1997 ___ saw the return of Hong Kong to the motherland.A. thatB. whenC. whichD. in which5. It is two years __ I joined the army.A. beforeB. sinceC. thatD. after6. It was two years ___ I joined the army.A. beforeB. sinceC. thatD. after7. --- Was it under the tree ___ you were away talking to a friend?--- Sure. But when I got back there, the bike was gone.A. thatB. whereC. whichD. while8. --- Why don’t we take a little break ?--- Didn’t we just have ____ ?A. itB. thatC. one this9. It was not until 1920 ____ regular radio broadcast began.A. whileB. whichC. thatD. since10. ___ is the fact that English is being accepted as an international language.A. ThereB. ThisC. ThatD. It11. It was about 600 years ago ___ first clock with a face and an hour hand was made.A. thatB. untilC. beforeD. when12. I hate ____ when people talk with their mouths full.A. itB. thatC. theseD. them13. It was only when I reread his poems recently ____ I began to appreciate their beauty.A. untilB. thatC. thenD. so14. It is the ability to do the job ____ matters not where you come from or what you are.A. oneB. thatC. whatD. it15. The Parkers bought a few house but __ will need a lot of work before they can move in.A. theyB. itC. oneD. which1.ABDAB 6.ADDCD11.AABBB语法填空：1.Some people have drawn the conclusion from Bowlby’s work that children should not be sent to day carebefore the age of three because of the parental separation _________ involves, and many people do believe this. （it）2._______ doesn't matter whether you're 4 years old or 40 years old. （It）3.________ was in our office that I told Jim the news yesterday.（It）4.________ is obvious that going for sports will do a lot of good to your health. （It）5.We would appreciate _______ if you could come to help us. （It）6._______ appeared to scientists that the stars had moved. （It）翻译：1.他从没想到过这幅画会值这么多钱。
（It）It has never occurred to him that the painting is worth so much money/that much.2.众所周知每位公民的生命权和健康权受法律的保护。
(It)It’s well known (to all) that every citizen’s rights of life and health are protected by the law.3. 鼓励老年人到社区的托儿所帮忙是个不错的点子，这能让他们充分发挥作用。
(It) It is a good idea to encourage old people to help out in nurseries in the neighborhood /community, which e nables/can enable them to play their full part.4.。
虽然交通被认为是这个地区最严重的问题之一，但是当地政府所采取的行动还远不尽如人意。
( it) Although it’s accepted that traffic is one of the most serious problems in this area, the action (that) the local go vernment is taking is far from (being) satisfactory.5.据估计今年将有百分之三十的大学毕业生存在就业困难。
(It)。