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: for+時(shí)間段 for12 weeks/three minutes since+ 時(shí)間點(diǎn) (起點(diǎn) )since 9 o39。clock this morning since+ 一段時(shí)間 + ago=for+時(shí)間 段 。 since two weeks ago= for two weeks。 for a year=since a year ago。 since 2022=for 4 years since+從句 (常 用一般過(guò)去時(shí) ) The Greens have lived in Beijing since they moved to Beijing from Paris. ? 時(shí)態(tài)填空: you sure you _______________(lose) the book?Yes, I ___________(look) for it everywhere, but I still can’t find it. h