Ought,ought't to,should,shouldn't Mustn't,
Ought,ought't to,should,shouldn't Mustn't,
should shouldn't 和 ought ought not to这两组的区别
needn't和 mustn't和shouldn't和ought't的区别?
用should,shouldn’t,must,mustn’t,needn’t,can’t ,may,have to 填空
We ought to go ,的反意疑问句,是oughtn't we还是ought we not?
In discussing environmental pollution we ought to keep ___ t
I think you ought to, you need/ needn't,
ought to should 区别
should/ ought to have
should,ought to区别
初二英语作业本 用should,shouldn't,can,must或mustn't完成句子.
presents(+should,shouldn't,must,mustn't)be things people use