I have to be in bed by ten o'clock.
这句中 by ten o'clock是什么意思,为什么不是at,have to be in bed 是什么句型.
人气:360 ℃ 时间:2020-01-27 21:59:22
解答
by ten o'clock------在10:00以前 === no later than / before 10:00
at 10:00 ------在10:00整
have to be in bed ------必须上床睡觉 (肯定句的句型)have to be in bed,为什么have to 后面要加be ,这是个怎样的句子结构你好again. have to 是情态动词,它不能表达谓语动词的完整意义,所以在have to 的後面必须加上真正动词/ 行为动词,它们一起构成复合谓语。be in bed 是一个动词短语------上床睡觉。我还以为是 have to be ,加 in bed 呢是have to + be in bed. 祝你愉快。
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