- BE TO + INFINITIVE. - Be to + infinitive. - Be to + infinitive is commonly used in news reports to talk about events that are likely happen in near future.. - Be to + infinitive is used to talk about formal or arrangements, formal instructions, and to give orders.. - However, when Be to + infinitive refers to the future from the past, we often use it to describe what happen to someone, whether they were able to influence events or not.. - We often use Be to + infinitive in if-clause to say that something must happen first (in the main clause) before something else can happen (in the if- clause).. - Compare the use of Be to + infinitive and the present simple for the future in if-clause. - Be about to + infinitive. - We can use Be about to + infinitive to say that something will(not) happen in the very near future:. - Be about to + infinitive is used in conversation. - We only use Be to + infinitive to talk about future events that can be controlled by people.. - While Be to + infinitive is mainly used in news reports and formal contexts, we often use Be about to + infinitive in conversation:
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