needhavedone和neednothavedone我知道needhavedone是表示本不要做却做了的事情.但造句的时候通常都是用neednothavedone我想问一下这两个有什么区别永needhavedone又怎么造句?

Question

need have done 和need not have done
我知道need have done是表示本不要做却做了的事情.但造句的时候通常都是用need not have done我想问一下这两个有什么区别永need have done 又怎么造句?

Answer 1

need have done. 本不要做的事却做了need not have done 本要做的事却没做for instances:i need have finished the tasks.i needn't have finished the tasks.