问题描述： think(s) hard 有s吗 1个回答 分类：英语 2014-09-20 问题解答： 我来补答 think 后是否有s,取决于主语.如果主语是第三人称单数时,加s,否则不加s.如 I often think hard at it.He often thinks hard at it. 展开全文阅读
