幫我看看下面的語(yǔ)法有木有錯(cuò)誤~
It was/will be +some time +before
分解開(kāi)看就是：It will be +some time +before+…+does/do
例句:It will be one and a half years before I leave school.還有一年半時(shí)間我就要畢業(yè)了.
It was +some time +before 過(guò)了多久才
例句：It wasn’t long before he told me that.沒(méi)過(guò)多久他就把那件事告訴我了.
It was/will be +some time +before
要區(qū)別于It is/has been +some time +since +did（注意動(dòng)詞的時(shí)態(tài)）
例句：it has been two years since I met him last time.自從上次碰到他后已經(jīng)過(guò)去兩年了.也就是說(shuō)有兩年沒(méi)見(jiàn)面了.
It has been two months since my father smoked(延續(xù)),譯為：戒煙
It has been two months since my father began to smoke(瞬間),譯為：吸煙