问题描述: 英语单项Q:Do I need bring an umbrella?A:I am afraid you__a:have to b:need 1个回答 分类:综合 2014-11-22 问题解答: 我来补答 a:have to如果是否定:I am afraid you don't have to =I am afraid you needn't .但肯定,不能用need. 这是语言习惯,只能用have to 不得不. 展开全文阅读