ought to,should,need,must,shall有啥区别
ought to should had better must have to 的区别
should must ought to have to的区别
ought to should 区别
should,ought to区别
关于英语ought to have done 与should have done的区别 有need have done
ought to 和should有什么区别?
ought to与should有何区别?
should和ought to有和区别
ought to和should有什么区别?
should 和 ought to 有什么区别?
must,can,may ,should,would,need和shall的区别
情态动词的用法:must,can(could),may(might),ought to need,dare shall(