來(lái)源:網(wǎng)絡(luò)資源 2023-02-18 19:25:38
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)。
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.
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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