什么情况下动词要加ing如下:
1、动词加ing前面必须加上be动词,形成be+动词ing (现在分词)作句子谓语,构成进行时态句子。
2、动词作介词的宾语要加ing (动名词) ;
3、部分动词用动词做宾语。做宾语的动词要加ing (动名词);
4、一些固定句式后面要加动词ing (现在分词) ;
5、动词修饰名词做后置定语时,要加ing;
加ing例句
I Practising speaking English Every day.
我每天练习说英语
Could you mind opening the door?
你介意开门吗?
I have finished reading three books.
我已经看完三本书
The old man Enjoys living in the country.
这老人喜欢住在农村。
He is reading a book now.
他正在看书
He was watching TV when his mother came in.
他妈妈进来时,他正在看电视.