1) I've cleared it already.

我已经擦过了。
2) Not for me, thank you.

我已经够了。
3) I took care of the check.

我已付过账了。
4) I've had more than enough already .

我已吃得过量了。
5) I have had lunch already.

我已用过午餐了。
6) But I have already finished sign them once.

我已签过一次了。
参考词条