问题描述: be able to do sth 更多用于什么时态? 1个回答 分类:英语 2014-11-09 问题解答: 我来补答 一般现在时态 are/is/am able to do一般过去时态 were/was able to do一般将来时 will be able to过去将来时 would be able to主要用于上面四种时态 展开全文阅读