问题描述： if后面跟什么时态 1个回答 分类：英语 2014-11-05 问题解答： 我来补答 if作如果讲时后面主句用的是将来式或者情态动词如：We'll go to the mountains if the weather is fine tomorrow.if作是否讲时,后面跟的事态随主句变化,与whether可以互换如：I don't know if he will come tomorrow.I didn't know if he would come the day after tomorrow. 展开全文阅读
