即将做某事的三种英语表达法区别

 　　be about to do sth

用法一：表示即将做某事。如：He’s about to go. 他就要走了。The package is about to come unwrapped. 那个包快散开了。Mrs. Brown was about to begin, but Jennie spoke first. 布朗夫人正要开始讲话，珍妮先讲了。He little dreams that the police are about to arrest him. 他一点也没想到警察就要来抓他。I had an intuition that something awful was about to happen. 我有一种直觉，一件可怕的事将要发生。

用法二：其否定式在美国英语中可表示“不打算（不愿意）”。如：I’m not about to stop when I’m so close to success. 在这样接近成功时我不打算就此罢手。

用法三：习惯上不与具体时间状语连用。由于本身已含有“即将”这样的时间概念，所以它习惯上不再与soon, at once, immediately, tomorrow 这样的具体时间状语连soon, at once, immediately, tomorrow 我们即将动身。误：We are about to start at once.正：We are about to start.正：We’ll start at once.

be going to do sth．有三层含义：

①表示打算、计划或决定要做某事。如：

We're going to spend our holidays in Wales this year．今年我们打算到威尔士度假。

②用以表示某事物即将发生或很可能发生。如：

I'm going to be twenty next month．下个月我就二十岁了。

③有迹象表明即将发生的动作或状态。如：

Look at those black clouds, there is going to be a storm．瞧那些乌云，暴风雨就要来了。

be to do sth.表示“一定会发生”，“将来的安排”，“将来可能发生”。例如：We are to get married next week.我们将于下周结婚。What am I to do?我该怎么做?I'm to see him today at 6 o'clock.我今天将在6点钟去看他。Am I to go on with my speech?我要继续讲下去吗?