A meeting is to be held at 3:00 oclock this afternoon.
be about to do sth.表示即可,就要,后面不能接时间状语或状语从句。
Autumn harvest is about to start.
4. 现在进行时
①表示说话时正在发生着的一个动作;表示现阶段但不一定是发生在讲话时;表近期特定的安排或计划;go、come等起止动作可用进行时代替将来时。如:
It is raining now.
He is teaching English and learning Chinese.
I am meeting Mr. Wang tonight.
We are leaving on Friday.
At six I am bathing the baby.(I start bathing the bady before six.)
The girl is always talking loud in public.(与always、often等频度副词连用,表经常反复的行动或某种感情色彩)
②下面四类动词不宜用现在进行时。(A)表示心理状态、情感的动作:like, love, hate, care, remember, believe, want, mind, wish, agree, mean, need。(B)表存在的状态的动词:appear, exist, lie, remain, seem belong to, depend on。(C)表示一时性动作的动词:allow, accept, permit, promise, admit, complete。(D)表示感官的动词:see, hear, notice, feel, smell, sound, taste, look。
5. 过去完成时
①常用过去完成时的几种情况:(A)在by、by the end、by the time、until、before、since后接表示过去某一时间的短语或从句以前发生的动作。如:By the end of last year, we had produced 20,000 cars. The train had left before we reached the station. (B)表示曾实现的希望、打算、意图、诺言等。常用had hoped / planned / meant / intended/
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