been是什么时态的

　　Progress has been particularly disappointing.

　　进展一直格外令人失望。

　　Where have you been? We've been looking for you.

　　你上哪儿去了？我们一直在找你。

　　Where have you been? I've been trying to get hold of you all day.

　　你去哪了？我一整天都在找你。