It's three weeks since you were ill(什么意思)

It's three weeks since you were ill(什么意思)
It's three weeks since you were ill(什么意思)

It's three weeks since you were ill(什么意思)
你生病已有三周了.
= You have been ill for three weeks.
你可以把它看成句型：It's +时间+since +句子
It is three weeks since he left here.

从你生病到现在，已经三个星期了

从你生病到现在，已经三个星期了