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He can't be at home.为什么在at前面有be?什么情况下要加Be?

分类: 作业答案 • 2022-07-08 22:33:46

问题描述：

答

加强语气的吧

答

can 是情态动词后面要加动词原形，因为后面没有动词，所以要用be动词

答

can是情态动词，后面应接动词原形。at home是表语，前面要加Be系动词，所以前面有Be。Be是系动词原形，在情态动词can，may, must, would, should后都是原型be。

答

你好，be at home是固定搭配

答

先弄懂‘我在家’ ：I am at home
CAN 是情态动词,后要接动词原形,而AM 的原形是be,

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He can't be at home.为什么在at前面有be?什么情况下要加Be?

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