你多久没来上海了?英文怎么说

楼上都正确

除此之外还可以是：When was the last time you were in Shanghai?/ When was your last time in Shanghai?

别人会回答six months ago/ a year ago，就能推断出此人有多久没来上海了

How long has it been since you came to Shanghai last time?

一般都这样问了，意思是：从你上次来上海到现在多久了？

How long haven't you been in Shanghai/

How long haven't you been in Shanghai?

when did you come to shanhai last time ?