It's + 时间段 + before-从句. 过多长的时间才…… 三、it用作形式主语 一、主语从句是在复合句中充当主语的从句,通常放在主句谓语动词之前或由形式主语it代替,而本身放在句子末尾。 1. It 作形式主语和it引导强调句的比较: It 作形式主语代替主语从句,主要是为了平衡...
6. It用在不能直接跟宾语从句的动词后面,尤其是表示好恶的动词后,enjoy, like, love, dislike, resent, hate, don't mind, be fond of, feel like, see to 宾语从句紧跟it之后 例I hate it you can swim so well and I can't. 7. It用在不能直接跟宾语从句的介词后面,...
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 (s...
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