since后一般加现在完成时,那加doing进行时态可以吗?例句说明
问题描述：
since后一般加现在完成时,那加doing进行时态可以吗?例句说明
答
现在完成时+since+一般过去时,如：I have worked here since i came here.
现在完成进行时+since+一般过去时,如：I have been working here for 10 years since i came here.这里强调动作仍然在继续.