题目内容：

Playing computer games is very interesting.
1、为什么play要加ing?
2、games后加S表示多种电脑游戏,为什么后面的be动词用单数,不用复数?

优质解答

Playing computer games 主语.is very interesting. 系表.这是个简单句,只能有一个谓语所以主语中的play就只能用分词形式了.Playing computer games 是个整体.computer games ARE very interesting. BUT: Playing c...