Her parents must not receive any message about her. They don’t know what has hap

游客2025-01-30 16

问题 Her parents must not receive any message about her. They don’t know what has happened to her.

选项 A、must not have received
B、ought not to receive
C、not ought to have received
D、not ought to receive

答案 A

解析选项分析。
本题的考点为must have been表示猜测的用法，而ought to的意思是“应当，应该”，其否定形式为ought not to，故排除选项C和D；画线部分用ought to不符题意，故排除，所以本题正确答案为A。
【知识拓展】语法拓展：ought to的否定式。
ought to是情态动词，意为“应当”“应该”，后接动词原形。ought to的否定形式是ought后直接加not构成，其否定形式可缩写为oughtn’t。在疑问句中将ought提到主语之前。
e．g．You oughtn’t to have crossed the road when the lights were red．
你不该在红灯时过马路。
Who ought I to address my request to?
我该向谁提出申请?

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