since +时间点since+一段时间+ago都是用来回答How long

wuhim13mj2022-10-04 11:39:541条回答

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之爱梦玄 共回答了21个问题 | 采纳率90.5%
i have been in beijing since 1990
对since 1990提问,是
when have you been in beijing
i have been in beijing since she moved here ago
对since she moved here ago提问,是
how long have you been in beijing
1年前

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