主讲教师：林斌 北京八十中学英语特级教师
开篇语
It is the first time that sb. has done sth.
It was the first time sb. had done sth.
Hardly had sb. done sth. when sth. happened.
No sooner had sb. done sth. than sth. happened.
sb. is always doing sth.
表说话者说话时的一种情感色彩，赞扬、责备或批评。
表位移方向的动词的现在进行时表将来。
I’m leaving for Shanghai tomorrow.
by+将来时间状语或表将来时态的句子，要用将来完成时态；
by+过去时间状语或表过去时态的句子，要用过去完成时态。
