高二英語It句型大掃描
e.g.（1）it was long before he gave an answer.
過了好久他才答復我。
（2）it was not long before he worked out the difficult maths problem.
不一會兒他就把那道數(shù)學題解出來了。
（3）it will be years before he comes back.
過幾年他才回來。
（4）it was five o’clock a he came to see me.
it was at five o’clock b he came to see me.
it is five years d i left school.
it was five years c he joined the army.
a. when b. that c. before d. since
3）it was + 時間 +when從句
在上述句型中it指時間，when引導的是時間狀語從句
e.g.（1）it was at midnight that i got back home yesterday.
（2）it was midnight when i got back home yesterday.
第一句是強調(diào)句型，被強調(diào)的時時間狀語，因此用介詞短語表達，而第二句是一般句型，時間以名詞的方式表達，用來作表語。
二、謂語動詞的強調(diào)
it is...that...結(jié)構(gòu)不能強調(diào)謂語，如果需要強調(diào)謂語，用助動詞do, did或does。如：
do come here tomorrow.
he did write to you last week.
mary does study hard now.
三、練習
1. — he looks unhappy.
—yes, but he can’t say what it is ___ is bothering him.
a. as b. that c. what d. which
2. (1) it was not until i had read your letter __c_ the truth.
(2) not until i had read your letter _a___ the truth.
a. did i learn b. i didn’t learn
c. that i learned d. that i had learned
3. you fix my what? it was to get my brakes repaired____ i brought my car in, not to get the engine replaced!
a. so that b. when c. that d. because
4. it was some time ___ we realized the truth.
a. when b. until c. since d. before
5. was it when he was training in the field _____ the captain got hurt?
a. when b. that c. how d. where