drove so fast.)

(4) It verb (to sb.) that…= sb/sth verb to do

(verb = appear, seem, come about, emerge, follow, chance, happen,occur, transpire, turn out , work out)

例 It (so) happened/chanced that they were out.(=They happened/chanced to be out.)

(5) It is v-ed that…=sb/sth is to do

(verb=say, report, think, believe, hope, expect, agree, accept,decide, determine, intend, plan, understand, know)

例 It is said that the couple have gotten divorced.(=The couple are said to have gotten divorced.)

三、It作主语的句型

1. It takes sb. … to do…(=sb takes…to do…)某人用多长时间做某事

例 It took the men a week to mend our roof.(= The men took a week to

mend our roof.)

2. It's (just)(un)like sb. to do…(不)像某人做某事的风格

例 It was (just) like him to think of helping us.

3. It's (about/high) time that… should /v-ed…是该做某事的时候了

例 It's(about/high) time that we should take action.

4. It's the x-th time (that) … have v-ed…第几次做某事了

例 It's the third time that he has failed the driving test.

5. It is/has been… since …continuous v-ed(延续性动词) 某动作已有多长时间不发生了

6. It was(not)… before…过(不)了多长时间某动作发生了

四、It 作形式宾语

用来替代作宾语的从句、动词不定式、动名词，而把真正作宾语的从句、动词不定式、动名词置于句尾。

It 作形式宾语的常见句型：

1. verb+ it+ adj./noun (for/of) to do/clause (verb=think, believe,suppose, consider, feel, make, keep…)

例 I think it hard for you to do the task on your own./I think it hard that you'll do the task on your own.

2. verb+it+adj./noun (one's) doing

(adj.=useless/worth/worthwhile)(noun=no use/no good/worth one's while/a waste

of time/money/energy/words) (verb=think, believe, suppose, consider, feel,

make, keep…)

例 I'll make it worth your while telling me about his secret.

3.verb+it+important/unimportant/necessary/unnecessary/natural/essential that … (should)…verb+it+of much/great/no/little importance that…(should)…(verb=think, believe, suppose, consider, feel, make, keep…)

例 I think it important that you (should) attendthe conference.

4. verb + it+ as+ noun/adj.+ clause (verb=accept, regard, take, see,

view)

例 The lecturer takes it as encouraging when so many students attend

his lecture.

5. v. +it + prep. + that…

owe it to sb. that…把…归功于…

leave it to sb that…把…留给某人去做

take it for granted that …想当然