當(dāng)不定式、動(dòng)名詞、從句等用作賓語(yǔ)且其后跟有賓語(yǔ)補(bǔ)足語(yǔ)時(shí)，就應(yīng)在賓語(yǔ)補(bǔ)足語(yǔ)前使用形式賓語(yǔ)，而將真正的賓語(yǔ)移至句末：

We found it difficult to persuade her. 我們發(fā)現(xiàn)很難說(shuō)服她。

He makes it a rule to get up before dawn. 他習(xí)慣于天亮前起床。

I think it very strange that he goes out walking almost every night. 我認(rèn)為他幾乎每晚都出去散步是很奇怪的。

【特別提醒】注意it用作形式賓語(yǔ)的三類(lèi)特殊句式：

1. 動(dòng)詞+it+if / when從句

當(dāng)enjoy, like, dislike, love, hate, prefer, appreciate等動(dòng)詞后需要接一個(gè)if或when引導(dǎo)的從句時(shí)，此時(shí)必須要先在動(dòng)詞后接it作形式賓語(yǔ)。如：

She won’t like it if you arrive late. 她不喜歡你遲到。

He hates it when people use his bike. 他討厭別人用他的自行車(chē)。

I’d prefer it if I didn’t have to do so much work. 要是我不必做那么多工作，那就太好了。

I would appreciate it very much if you would help me with it. 如果你能幫助我做這事，我會(huì)十分感激。

2. 動(dòng)詞+介詞+it+that從句

能用于此句型的主要有三個(gè)動(dòng)詞，即depend on, answer for, see to。如：

You may depend on it that he will turn up in time. 你可以相信他會(huì)及時(shí)趕到的。

I can’t answer for it that the boy is honest. 我不能保證這個(gè)男孩是誠(chéng)實(shí)的。

I’ll see to it that all these letters will be sent to the post before twelve. 我將注意讓所有的信件在12點(diǎn)以前送到郵局。

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