be about to 正要做某事,将要做某事 它是将来时的一种表达法,但它所在的句子中不能出现具体的时间. Just as I was about to leave the room, the telephone rang. be about to 其后常搭配连词when , be about to do …when…表示正要做某事时突然…. He was about to say something when he saw her waving at him.

2. Now ladies and gentlemen, you’re about to hear the most incredible tale.