he must stay in bed for a week.这句话中主语是第三人称单数stay为什么不用stays?

He is ______(terrible) ill.He must stay in bed. How____________________?He must stay in bed for five days. must stay in bed可以说成stay in bed 是同样的道理吗?但是He must stay in bed.怎么翻译呢? so he must stay in bed for a week.句中stay为什么不加s he must stay in bed.he 是第三人称 为何 must 或这 stay 不用加s呢? tom is till .he must stay ( ) for tow days a.in zhe bed b.in bed c.on bed You must stay in bed.的意思 he must stay in bed 请问 in后面加the 有什么区别吗? his h() hurts. so he must stay in bed. the child has a bad c() Tom must has a headache and he stay bed in?怎样连词成句 请问英语介词he must stay in bed for a weekfor在这里该如何理解, He must stay in bed for a week改为一般疑问句 dave has a flu .so he must stay in bed .改错 改错 mr.williams are ill.he must stay in bed of another teo days. he must stay in bed for a week可不可以把for删了?为什么? he must stay in bed for a week.这句话中主语是第三人称单数stay为什么不用stays? He has a bad cold,Mr.Williams,so he must stay in bed for a weekso he must stay in bed for a week其中的stay为什么不加S