I have to be in bed by ten o'clock.

来源：学生作业帮编辑：百度作业网作业帮分类：英语作业时间：2024/07/16 10:50:52

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.

y 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）
再问： 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
再答：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。
再问：我还以为是 have to be ,加 in bed 呢
再答：是have to + be in bed. 祝你愉快。

I have to be in bed by ten o'clock. I have to be in bed by ten o'clock.[用in bed提问] have,to,in o'clock,I,bed,by,be,ten(.)连词成句 I have to be in bed by ten o’clock.的同意句是什么? I have to be in bed (by ten o'clock).对括号内的提问英语首字母填空 I have to b( ) in bed by ten o'clock. I have to ____ (be)in bed by nine o' clock ten,night,at,must,I,be,in,by,bed,o'clock.(连词成句）外语：连词成句（1)has,by,in bed,she,to,ten,o`clock be She has to be in bed by ten o'clock I have to be home by ten o'clock.为什么不是be at home? I have to be in bed ___ ten o'clock.选A还是C呢?A.at B.in C.befor