so he must stay in bed for a week因此他必须卧床一周 这句话he是第三人称为什么动词st

so he must stay in bed for a week因此他必须卧床一周 这句话he是第三人称为什么动词st 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? so he must stay in bed for a week.句中stay为什么不加s 英语第三人称问题He msut stay in bed for a week这意味什么stay不加s? He has a bad cold,Mr.Williams,so he must stay in bed for a w He must stay in bed for a week改为一般疑问句 请问英语介词he must stay in bed for a week he must stay in bad for a week 怎么翻译 he must stay in bed. How____________________?He must stay in bed for five days. dave has a flu .so he must stay in bed .改错 his h() hurts. so he must stay in bed. the child has a bad c