I have to be in bed by ten o'clock.
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When have you to be in bed?
What time have you to be in bed?
BY TEN OCLOCK 是表示时间的状语，对此提问用表示“什么时候”的when提问
When do you have to be in bed?
at 的话,那就是整十点了
have to必须,为一情态动词 不得不 be in bed 休息
have to be in bed必须去睡觉
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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）
by ten o'clock到十点(为止)
have to必须，不得不(后加动词原形)
(be) in bed躺在床上
归府万君：[答案] be have to+动词原形 我必须9点睡觉
西市区13083266501： I have to be in bed by ten o'clock.的同意句是什么? - ？
归府万君：[答案] 这个句子很别扭, I have to go to bed at 10 o'clock 一般时间不会和介词by同用
西市区13083266501： 英语首字母填空 I have to b( ) in bed by ten o'clock. - ？
归府万君： I have to b(e) in bed by ten o'clock. be in bed是上床睡觉的意思全句为:我必须在十点前上床睡觉
西市区13083266501： 首字母提示...新目标英语7下u121.a few years l____.he went to American2.please help your mother to w____the dishes3.I have to be in bed b____nice o`clock - ？
归府万君：[答案] 1 later 2 wash 3 before
西市区13083266501： 什么是to be和to have句型 - ？
归府万君： to be 是将来是的句型.意为将要做.例如:There are several things to be done.这里有一些事情需要做. to have 不是一个专门的句型.have to 才是一个专门的短语,意为不得不.to have指 去怎样.例如一个有名的习语:To have butterflies in one's stomach 指 忐忑不安.
西市区13083266501： I have to b - - - in bed by ten o'clock - ？
归府万君： e
西市区13083266501： I have to in bed by 10:00 every night. - ------？
归府万君： I have to 填be.
西市区13083266501： I have to be in bed b()ten o'clock - ？
归府万君： behind记得点好评哈
西市区13083266501： 我必须在九点之前躺在床上 英语i have to( )( )bed( )( )( ) - ？
归府万君：[答案] i have to( go )( to )bed( before )( nine )( o'clock ) 或者 I have to be in bed before nine o'clock. go to bed -去睡觉. be in bed 在床上.两者都可以填在这里.
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