概念:现在完成进行时表示从过去到现在并且将继续进行下去的动作。

2.谓语结构: Have/has been doing

3.时间状语: all day/month; this month/week/year; these days; recently/lately, in the past few+时间段，since+时间点，for+时间段，how long, when, until, all day 等。

He has been working all day.他整天都在工作。

4.句式:

肯定句:主语+have(has) been+v.-ing(现在分词)(+其他).

It has been raining for three days. 雨下了三天了。

We have been waiting for him for two hours.我们等他等了两个小时。

否定句:主语+have(has)+not been+v.-ing(现在分词)(+其他).

He hasn’t been working since he got laid off three months ago.他从三个月前被解聘后就没工作。

疑问句:Have(Has)+主语+been+v.-ing(现在分词)(+其他)?

Have you been writing all the day?你一整天都在写吗?

How long has it been raining? 雨下了多久了?

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