求现在完成时的标志词!
问题描述：
求现在完成时的标志词!
答
already ,yet ,since ,so far(到目前为止) up to now(到目前为止) recently.in the past /last years在过去的几年中it is the first/second.time sb +现在完成时如,it is my first time I have been here....