小學(xué)英語必備語法:現(xiàn)在進(jìn)行時

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    現(xiàn)在進(jìn)行時的基本用法:
    a. 表示現(xiàn)在( 指說話人說話時) 正在發(fā)生的事情。
    We are waiting for you.
    b. 習(xí)慣進(jìn)行:表示長期的或重復(fù)性的動作,說話時動作未必正在進(jìn)行。
    Mr. Green is writing another novel.
    (說話時并未在寫,只處于寫作的狀態(tài)。)
    She is learning piano under Mr. Smith.
    c. 表示漸變的動詞有:get, grow, become, turn, run, go, begin等。
    The leaves are turning red.
    It's getting warmer and warmer.
    d. 與always, constantly, forever 等詞連用,表示反復(fù)發(fā)生的動作或持續(xù)存在的狀態(tài),往往帶有說話人的主觀色彩。
    You are always changing your mind.
    典型例題
    My dictionary ___, I have looked for it everywhere but still___ it.
    A. has lost, don't find   B. is missing, don't find C. has lost, haven't found  D. is missing, haven't found.
    答案D. 前句是一個仍在持續(xù)的狀態(tài),應(yīng)用進(jìn)行時,由于沒有找到,其影響仍然存在,應(yīng)用完成時,瞬間動詞用于否定式時可用于完成時。