都可以.主句用一般現(xiàn)在時(shí)和現(xiàn)在完成時(shí)都行.
例如：It is/has been three years since I joined the amry.
很高興為你解答!
多謝你的問(wèn)題!It's been a long time since I last saw a film,還是It has been a long time since I last saw a film對(duì)？it's been=it has beenit's=it is
It's been a long time since I last saw a film.還是It's a long time since I last saw a film.
It's been a long time since I last saw a film.還是It's a long time since I last saw a film.
英語(yǔ)人氣：315 ℃時(shí)間：2019-08-18 20:32:50
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