2012中考英語(yǔ)沖刺必備知識(shí) 24

字號(hào):


    since的四種用法
    1、since+過(guò)去一個(gè)時(shí)間點(diǎn)(如具體的年、月、日期、鐘點(diǎn)、1980, last month, half past six)。
    例如:
    I have been here since 1989. 1989起,
    我一直在這兒。
    2、since +一段時(shí)間+ ago。
    例如:
    I have been here since five months ago.
    我在這兒,已經(jīng)有五個(gè)月了。
    3、since +從句。
    例如:
    Great changes have taken place since you left.
    你走后,變化可大了。
    Great changes have taken place since we were here.
    我們走后,變化可大了。
    4、It is +一段時(shí)間+ since從句。
    例如:
    It is two years since I became a postgraduate student.
    我考上研究生有兩年了。
     
    
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