—No, you needn’t(don’t have to).不,你不必。
另外,我们要特别注意“情态动词的否定形式 完成时”的表达。
can’t have done sth.表示“不大可能做某事”,needn’t have done sth.表示“本来没有必要做某事但做了”,oughtn’t to或shouldn’t have done sth.表示“本不应该做某事但做了”。如:
He can’t have been to Changsha, for he knows little about it. 他不大可能到过长沙,因为他对长沙几乎一无所知。
You needn’t have taken these exam papers, there were no English lessons this morning. 你本不必带这些试卷,今天上午没有英语课。
I was really anxious about you, you shouldn’t have left home without a word.我真担心你,你不该一句话不说就离家了。
You oughtn’t to have married her, David. It was a great mistake.你本不该跟她结婚,戴维,那是个大错误。
2.A UN official said Israel had now agreed to release the entire cargo from three Turkish ships, provided it was used only for humanitarian purposes.
provided引导条件状语从句。