| 单词 | be about to do sth; be going to do sth; be to do sth |
| 释义 | be about to do sth; be going to do sth; be to do sth 意思都为“将要做某事”，但要注意以下用法区别： ❖ be about to do sth 强调“马上要做”，后面不再接表示时间的词。如：We were about to leave when it began to rain. 我们正要离开时，天下起了雨。不能说We are about to visit him next week. ❖ be going to do sth 表示普通意义的“将要做”，可以表示有迹象要发生某事，也可强调“有准备要做”。如：It's going to rain. 天要下雨了。◇ I'm going to meet her at the station. 我要去车站接她。 ❖ be to do sth 强调“明确计划或安排做”，与be going to do sth 意思接近。如：They are to be married in May. 他们将于5月结婚。be to do sth还可用于条件状语从句中，表示假设、打算或意图。如：He must study hard if he is to pass his exams. 如果他要想通过考试，他得努力学习。 |
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