为什么是He must wait here.而不是He must waits here.

为什么是He must wait here.而不是He must waits here. She must wait for her mother 的否定句是什么 一英语BE的用法问题1.Hurry up!he must be waiting for us at the station.这里为什么是must be waiting 去掉be must waiting wait 也是动词啊?这些情态动词 什么时候后面根be 什么时候2.you will be sleepy.改成一般疑问 Must I wait till he comes back No,you( ). You must have met her yesterday的反意疑问句为什么是didn't it he must have finished his homework last night,didn't he?为什么是didn't He kept ---(wait) for her for about half an hour. wait for 等待；为什么是wait here for you? wait的过去式为什么是waited (However)hard he tries,he canhardly avoid making mistakes in her homework,为什么是however? 他站在那里等公共汽车,He stands there waiting for the bus,为什么是填waiting而不是wait呢? Says,he ,wait for,that,must,the bus,he,（连词成句） He must have been asleep at that time,(wasn't) he?为什么是用 wasn't 而不是 didn't don't leave her waiting outside in the rain:she weill catch a cold.我为什么是 waiting 啊? wait 不可以吗? He ___ know where her house is.答案为什么是may而不是maybe呢 The women looked after the boby as if he were her child he后面为什么是用were? 根据所给问句做出相应的否定回答.---Do you have to go now?---No,_______.---Must she go to the shop?---No,_______.---Does he have to decide immediately?---No,_______.---Did you have to take a taxi?---No,_______.---Must you wait for her?-- 为什么是wait in line不是wait for line wait for不是也有等待的意思吗?