如何学习英语语法中的一般现在时？

1、例句：She often goes shopping.        

          I like speak English.

2、例句：She often goes running in the morning.

          I usually eat breakfast  at 7 every morning. 

3、例句：All my family like swimming.

          My father is always ready to help poor people .

4、例句： The Earth rotates from west to east.

　       Xizang lies in the west of China. 

5、例句：The train leaves at nine tomorrow .       

          She comes back tomorrow.

6、 例句：I'll tell him the news when he comes back.

           If you leave the job , they will talk with you in  details.