爱思英语编者按：～have(has) been V-ing .句式表示从过去一直持续到现在的一种状太，根据情况后面可以接since或者or所引导的时间状语。

必须掌握的关键句型:41

41.～have(has) been V-ing .一直～。

I've been watching TV since this morning .从早上开始，我就一直在看电视。

He's been studying for a few hours .他已经学习了好几个小时了。

It's been snowing since last night .从昨晚开始一直在下雪。

基本例句巩固练习1:

A:What have you been doing ?
你一直在干什么呢？

B:I've been making a model plane .
我在做一个飞机模型。

A:Do you need some help ?
需要帮助吗？

B:No , htanks , Mom . I'd like to finish it up by myself .
不，谢谢，妈妈。我要自己完成。