have been doing 的用法,

来源：百度知道 编辑：UC知道 时间：2024/06/06 11:18:55
My borhter has worked in that factory since two years ago
问： 不是have been doing吗， 为什么会是has worked，余很笨，大家说清楚点哦

相同：
1：现在完成时（have done)和现在完成进行时(have been dong）都可以表示从过去某一时刻开始一直延续到现在的动作。Example:
I have worked in this school since 2000.
I have been working here since 2000.
2:现在完成时和现在完成进行时都可以表示一段时间内延续的动作。Example:
Mr. Smith has lived here for 20 years.
Mr. Smith has been living here for 20 years.
以上句子用现在完成时和现在完成进行时，含以上没区别，两种时态可互换。但两种时态也存在用法上的差别。