(since/ for)-- how long have you benn here?(since/ for)-- how long have you benn here? --__(since/ for) vhalf past three.选择哪个?为什么?

how have you been since l saw you last英译中 for、since、how long 有何共同用法 是不是when.现在完成时.since.how long 现在完成时 .for. (since/ for)-- how long have you benn here?(since/ for)-- how long have you benn here? --__(since/ for) vhalf past three.选择哪个?为什么? _________have you been traveling Since I was a boyA Since whenB WhenC For whenD How much how long have you lived shenzhen?tenyears A in；FOr B in；Since C at,For D on,since how long引导的问句一定要用for + 一段时间、since + 时间点或since引导的时间状语从句来答吗? 由how,long,for,since引导的时间状语中,句子动词必须为 How long have you studied English in XXXXXX English School?用 since 回答：---------------------------------------------.用 for 回答：---------------------------------------------. -How long have you live here?-____ 1997 A.Since B.In C.For D.From How long应该用什么来回答?For 还是 since是只能for用吗?还是两者都能用since是加一个时间点, How can l write a love song for you? l have not seen kate for 10 years(用since 1990修改)英语 since和for用法 比较since和for 用for 或者since The use about the word since.How long is it since you lived in shanghai?,is it as same as this sentence How long is it since you left shanghai? .Thanks for your help. since when ,how long 区别