在此结构中it为形式宾语，不定式短语作真正的宾语。例如：
I find it very interesting to play football.
我发现踢足球很有趣。
She thinks it her duty to help us.
她认为帮助我们是她的职责。
14. get ready for sth./to do sth.
get ready for sth.意为“为某事做准备”；get ready to do sth.意为“准备做某事”例如：
We are getting ready for the meeting.
我们正在为会议做准备。
They were getting ready to have a sports meet at that moment.
他们那时正准备开运动会。
15. get/receive/have a letter from收到……的来信，相当于hear from
Did you receive a letter from John？
你收到约翰的来信了吗？
I got a letter from my brother yesterday.
我昨天收到了我弟弟的一封来信。
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