need和must有什么区别?

need和must有什么区别? need和must有什么区别? must,can,should,need有什么区别 must 和must not ,have to 和not have to ,need和not need有什么区别 need和need to有什么区别 must need 的用法和区别 请讲讲must和need 的区别, A．may B．shall C．need D．must 的用法和词义有什么区别 英语need doing和need to do有什么区别 need doing 和 need to be done有什么区别? need for和need of 有什么区别? needs和need有什么区别感谢 need和require有什么区别? must和must be 有什么区别求详细! must be和must have be有什么区别谢谢 “SHOULD”和“MUST”有什么区别? must和 have to有什么区别? need ,must 和have to 的区别must和 need的区别