is your grandpa still smoked?----no ,It's years s(since) he smoke_英语解答

is your grandpa still smoked?----no ,It's years s(since) he smoked?讲解一下为什么用since
smoking 刚打错了

人气：165 ℃　时间：2019-10-19 06:30:47

解答

since有是自从,但是意思有“自从不再做……时起”
就是说从他不吸烟起已经有一段时间了.