您的位置：since的四種用法
來源:本站原創(chuàng) 點(diǎn)擊率: 發(fā)布: 2013-10-8
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上海新東方冬令營，詞匯課堂，since的用法講解
上海新東方和您一起學(xué)習(xí)
1) since +過去一個(gè)時(shí)間點(diǎn) (如具體的年、月、日期、鐘點(diǎn)、1980, last month, half past six)。
i have been here since 1989.
2) since +一段時(shí)間+ ago
i have been here since five months ago.
3) since +從句
great changes have taken place since you left.
considerable time has elapsed since we have been here.
4) it is +一段時(shí)間+ since從句
it is two years since i became a postgraduate student.
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