请问英语高手,语法题:It's eight o'clock now. You ( should) be doing yo
请问英语高手,语法题:
It's eight o'clock now. You ( should) be doing your lessons. You (can't) be watching TV.
这是英语考试的一填空题答案,
1.问为什么 填should与can't ,这两个空是表被动吗?
2.如果没有空格限制,改成It's eight o'clock now.You must do your lessons.You can't watch TV. 句子通不?
3.如果用It's eight o'clock now. You should do your lessons.You can't watch TV. 把句子中的be 与ing 删去,句子在语法上通不?