1.现在进行时
He is reading a newspaper
2.固定短语
we have fun visiting the village
we have a good time visiting the village
we are busy making soup
3.非谓语动词.
I finish reading every day
He often practices playing the piano
We enjoy learning English
He keeps exercising
4.动词放句首做主语.
Cutting down trees is not good
Reading a lot of books will make you a wise(明智) man
5.介词 ving
Hearing the news. I cry
After sleeping,I feel good
