have been doing sth是什么时态

回答
爱扬教育

2022-03-15

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have been doing sth是现在完成进行式时态。
have:vt. 有; 持有; 占有; 由…组成; 显示出,带有(性质、特征)。
been:v. 曾经; 曾经到过(某地)。
doing:n. 所做的事; 发生的事; 所作所为。

扩展资料

  There have been some problems but basically it's a good system.

  虽然出现过一些问题,但这基本上仍不失为一个好系统。

  His family have been a very positive influence on him.

  他的家庭对他有十分良好的影响。

  There have been many changes in recent years.

  近几年发生了许多变化。

  I'm doing some research on the subject.

  我正就这一课题进行研究。

  How will the company be doing ten years further on?

  十年以后公司的情况将如何呢?

  He's doing very well at school.

  他在学校里学习很不错。