【—since的】since的后面一般可以加一段時(shí)間、一個(gè)時(shí)間點(diǎn)或者是一個(gè)從句的四種用法。
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.
關(guān)于since的四種用法是我們?cè)谟⒄Z中幾乎是隨處可見的，所以同學(xué)們不可以馬虎了。
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