havebeendoing用法,you have been doing

havebeendoing用法,you have been doing

have been doing是现在完成进行时。现在完成时表示从过去一直持续到现在，并且现在并未停止，还将持续到将来。时态时态（tense）是表示行为、动作、状态在各种时间条件下的动词形式have been doing是现在完成进行时。例句：The car must have been doing at least 100 miles an hour. 这车速肯定每小时至少100英里。I have been doing some h

has been doing 一般用来表示现在完成进行时。现在完成进行时的结构是“I/we/you/they have been doing sth.”、“he/she/it has been doing sth.”。表示从过去某时开始一首先要理解记忆现在完成进行时的动次结构：have been +doing,实际上就是把现在进行时“be + doing”中的be 变成“have been”---现在完成时的be 动词形式。当然，对于单三主语，我们

2) 现在完成时- have/has been 若使用现在完成时的主语为I/ You/ We/ They 或名词复数(Cars/ Children/ People),则使用have been; They have been married for 23 years since 1997havebeendoing现在完成进行时。

＋＾＋ 　　havep.p现在完成时。

⊙﹏⊙ 　　二者有共同点，但最大区别在于现在完成

ゃōゃ 1、has been doing 是现在完成进行时一、结构I/ we/ you/ they have been doing sthhe/ she/ it has been doing sth二、主要用法表示从过去某时开始一直持续到have been doing就是现在完成进行时(present perfect continuous),我们用它来表示到现在为止已经持续了一段时间的连续性动作，如，It has been raining for an hour. (已经下了一个

＋▂＋ have been doing是现在完成进行时. have done是现在完成时. 现在完成时的用法①表示结果的现在完成时现在完成时着眼于过去的动作对现在产生的结果或影响.这是现现在完成进行时(have been doing)：和现在进行时很像1) 用法：表示某一动作开始于过去某一时间，延续