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,宾语从句紧跟it之后(except that例外)
例 I'm for it that you will follow their advice.