13. feel/find/think it adj./n. to do sth. 認為某事……
    在此結構中it為形式賓語，不定式短語作真正的賓語。例如：
    I find it very interesting to play football.
    我發(fā)現(xiàn)踢足球很有趣。
    She thinks it her duty to help us.
    她認為幫助我們是她的職責。
    14. get ready for sth./to do sth.
    get ready for sth.意為“為某事做準備”;get ready to do sth.意為“準備做某事”例如：
    We are getting ready for the meeting.
    我們正在為會議做準備。
    They were getting ready to have a sports meet at that moment.
    他們那時正準備開運動會。
    15. get/receive/have a letter from 收到……的來信，相當于hear from
    Did you receive a letter from John?
    你收到約翰的來信了嗎?
    I got a letter from my brother yesterday.
    我昨天收到了我弟弟的一封來信。