Question

有没有 is to do sth. 这个短语

帮帮哦

Answer 1

您好，这个短语是有的：
通常是表达“将要做什么”的意思。
但“Be+不定式动词”在不同情况下，可以表示很多种不同的语义。
下面便是其中九种：
⒈表示坚决的命令。例如：
This naughty boy is to stay here until the class is over.
⒉表示“计划”或“安排的事项”。例如：
Betty is to be married soon.
⒊表示“可能性”。例如：
Are you to pay the debt for your wife?
⒋表示“意图”或“打算”。例如：
If you are to be there on time, you had better hurry.
⒌表示“应该”。例如：
Such nasty questions are to be avoided.
⒍表示“不可避免”。例如：
Anne was wondering what was to become of her boy friend, Tommy.
⒎表示“假设”。例如：
If I were to do it, I would do it well.
⒏有“期待将来”的含意。例如：
Henry's appointment with the accountancy firm is yet to be confirmed.
⒐有“必然会发生”的含意。例如：
Tom wasn't worried about his head injury, but it was to be troublesome for him later.
-_- 我是英语专业的，希望能帮到您吧，哈哈。

Answer 2

be to do sth 是有的，表将要做什么的意思。
更常见的短语是be to do with sth

Answer 3

be to do sth
第一，表示计划或者安排要做的事 例:when are you to leave for home? 你什么时候回家？
第二，表示应该，相当于should，ought，例：you are to report to the police,你应该报告警察
第三，表示必须，the letter is to hand to him in person,这封信必须亲手交给他
基本的用法就这三种，这些短语是基础，用法很多