现在完成式 (has/have + p.p.)

一种发生于过去某时，经过一段时间，而延续到现在的状态或已完成的动作。

Janice is away on holiday. Janice去度假了。

She has gone to Japan. 她去日本了。

Andy is back home from holiday now. Andy度假回来了。

He has been to Korea. 他去了韩国。

Lisa has gone out. She'll be back in an hour.

Lisa出去了，一小时候回来。

Have you been abroad? Yes, I have.

你出过国吗？ 有。

Where have you been? 你去过哪些地方？

I've been to China, Hong Kong, Japan, and Korea.

我去过中国、香港、日本、和韩国。

How many times have you been to China? Only once.

中国去过几次？ 只有一次。