没必要英文

没必要:don't have to 不需要:needn't一般都用needn't,礼貌方面你就用needn't就可以了,不需要肯定比没必要礼貌些,没需要说不定对方还是想做呢?你所说的三种形式是一个意思,只是在用法上面有点不同,看你采用什么样的句子结构.there is no need for you to do that.you don't need to do that.you needn't do that.这三句都是表示"这你不需要做"

no need 放轻松，老兄！你没必要这麽拼吧。Relax, man! There's no need for you to work this hard.我听到了，没必要粗暴地与我讲话。I heard you. There's no need to jump down my throat.他没必要现在做这艰苦的工作。He doesn't have to do the hard work now.没必要大喊大叫，请克制自己。No need to shout! Please try to control yourself.

It's not necessary.

没必要it is not necessary或It Is no use