It was in the street that I met Xiaoming last night.

　　It ws last night that I met Xiaoming in the street.

　　It was I who met Xiaoming in the street last night.

　　2、含有“It is …”的句子

　　（1）It is time (for sb.) to do sth.

　　It is (high) time that sb. did sth.(虚拟语气)

　　（2）It is + 形容词（+of / for sb.）+ to do sth.

　　通常用 of的词有brave、clever、careful、hopeless、kind、good、naughty、nice、silly、stupid、foolish、wise等。

　　（3）It is + 形容词 + that + sb. + (should) do sth.（虚拟语气）

　　能用于这个句型的形容词有strange、wonderful、natural、good、proper、right、wrong、well、fortunate、important、necessary、useless、likely、probable、impossible等。有时可省去should而直接用动词原形。如：

　　It is important that we should pay close attention to grain.

　　It is natural that he（should）say so.

　　（4）It is no use/ good + doing sth.

　　It is no use trying again = It is of no use to try again.

　　（5）It is + 被强调部分 + that/who + …

　　Was it in the street that you met her?

　　Who was it that called him“comrade”?

　　It was not until yesterday that I met my old friend.

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