The door is open.Who has opened(open)it?Sorry,I don't know.为什么用一般现在

问题描述:

The door is open.Who has opened(open)it?Sorry,I don't know.为什么用一般现在

has opened 是现在完成时,不是一般现在时.现在完成时表示过去的动作对现在造成了影响.刚才那里用什么时态好?用现在完成时还是一般过去时?为什么?用现在完成时较好,因为前面说过了,门已经打开了。