2022高考英語備考 it的用法
it is five months since i arrived in new york.我到紐約已經五個月了。
it is five months since i was in new york.我離開紐約已經五個月了。
（注意：終止性動詞表示從動作發生時算起；如果是狀態動詞或持續性動詞，則從動作或狀態結束時算起。）
（8）it is + 時間 + before …
這個句型和上面句型中時間都是時間段，如long、years、months、weeks、five days、three hours、twenty minutes等。不過主句的時態多用一般將來時或一般過去時。
it will be several years before we meet again.
我們要過好幾年才能再見面。
it was not long before they set out for the front.
不久他們就出發去了前線。
（9）it is /was/will be the first/second/third … time that …
it is the first time that i have been here.
it was the second time that he had seen the film.
（10）it is up to sb. to do sth … 應由某人做某事。
it is up to you to decide whether we start or not.
二、精典名題導解
選擇填空
1. _________ is a fact that english is being accepted as an international language.
a.there b.this c.that d.it
解析：答案為d。本題考查作形式主語的用法。that引導的從句是真正的主語。為避免頭重腳輕而平衡句子結構，將it置于句首作形式主語。
2. i hope there are enough glasse for each guest to have ________.
a.it b.those c.them d.one
解析：答案為d。本題考查替代詞it和one的區別。it用于替代同類的、特定的、同一的事物；one替代同類的、泛指的人或物。根據題意“我希望有足夠的杯子使每個客人有一個。”可知應用one泛指enough glasses中的一個。
3. was __________ that i saw last night at the concert?
a.it you b.not you c.you d.that yourself
解析：答案為a。本題考查強調句型的疑問式。只須將句序變為陳述句便不難得出答案。
4.it was back home after the experiment
a. not until midnight did he go b. until midnight that he didn’t go
c. not until midnight that he went d. until midnight when he didn’t go
解析：答案為c。此題考查的是not…until句型的強調結構，其最根本結構是：he did not go back home after the experiment.①,把①轉變為not until midnight did he go back home after the experiment.②,注意②中的倒裝結構，把②中劃線部分放在強調結構it be 被強調部分that…中進行強調，但注意that從句后面不用倒裝形式。