一般用现在完成时.如 They've been squatting in an apartment for the past two years.他们过去两年来一直擅自占用一套公寓.
Trade has been slack for the past six months,but it is now picking up.在过去六个月中贸易一直不景气,但现在状况正在好转.
一般用现在完成时.如 They've been squatting in an apartment for the past two years.他们过去两年来一直擅自占用一套公寓.
Trade has been slack for the past six months,but it is now picking up.在过去六个月中贸易一直不景气,但现在状况正在好转.