why什么是don't need to worry而不是needn't to worry

why什么是don't need to worry而不是needn't to worry He ____ to worry about me .横线上填don't need 还是needn't is everything___we need to do__------Yes,you needn't worry a don't need to 和needn't 改错；she need"t to worry . you don't have to worry...找首歌 needn't to come,don't need come,don't need coming与needn't co 英语翻译一、选择1.We don't need ___ about thatA、worry B、to worry C、w don't worry,I think what we need to do______（选择题） 填空,首字母已给出.Don't worry about it.You need to r______.People s_ you work in the restauants ,so you don't need to worry about we don't have to worry about the 1.---of hunger,we only need