什么时候动词要加ing

1、表示某人、某物正在进行某事时，动词后加“ing”，例如：I am visiting my grandma tomorrow。2、动词做宾语时，做宾语的动词后加“ing”，例如：I\'m looking forward to seeing you again；

3、固定句式后面的现在分词后加“ing”。例如：Playing in the park。

双语例句

1、He was watching TV when his mother came in.他妈妈进来时，他正在看电视。

2、We have fun Playing in the park on Sunday.星期日我们在公园玩的很开心。

3、Gardening is very popular in Britain.园艺在英国非常受欢迎。

4、He was walking along the street.他沿街走着。