教师招聘英语知识点：be to do、be going to do辨析（语法知识）四

be to +动词不定式中的be to用作情态习语, 这时的be to do表示: “计划”、“安排”、“义务”、“应该”、“可能”、“命运”等。(have to, ought to)。如:

He is to have a holiday. (表示将来)

The committee is to meet today. (表示计划、安排)

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