have been doing是什么时态?

来源：学生作业帮编辑：拍题作业网作业帮分类：英语作业时间：2024/04/28 13:37:06

have been doing是什么时态?
不要说是过去时间里开始、并持续到现在,一直在进行的（或刚结束的）动作或状态,要说明确,比如：现在进行时
例句：--I ‘m sure Andrew will win the first prize in the final exams
I think so.He has been preparing for them for months.

现在完成进行时（1.表示从过去某时开始一直持续到现在的动作,并且还将持续下去.2.表示在说话时刻之前到现在正在进行的动作.）

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