作业帮为什么有的词后面要加ing
来源：学生作业帮 编辑：拍题作业网作业帮 分类：英语作业 时间：2024/04/28 07:17:30
为什么有的词后面要加ing
语法需要,如：
固定结构,enjoy doing sth,look forward to doing sth;
时态结构：进行时：Look,the boying is playing with his mum.I was cooking when you called yesterday evening.
动词加ing作形容词：That was really exciting news.He's an interesting man.
动词作主语时,须变成加ing的动名词：Walking is good exercise.Playing a kite is fun.
固定结构,enjoy doing sth,look forward to doing sth;
时态结构：进行时：Look,the boying is playing with his mum.I was cooking when you called yesterday evening.
动词加ing作形容词：That was really exciting news.He's an interesting man.
动词作主语时,须变成加ing的动名词：Walking is good exercise.Playing a kite is fun.