It's a long time since they left.
他們已經(jīng)離開很久了。
It's been two weeks now since she called.
她到現(xiàn)在已經(jīng)有兩個(gè)星期沒來電話了。
I had been out since I was 17.
我從17歲起就公開我是同性戀。
The children are completely out of control since their father left.
這些孩子自他們的父親離開后就無法無天了。
It's been an age since we've seen them.
我們有很長一段時(shí)間沒有見到他們了。