你应该多向他学习

1. You should learn more from him.

2. Dad permits me to play computers more.

3. Dad asks me to play computers less.

4. You'd better not play computers more every day, that's not good for eyes.

5. Can't you play computer games less?

6. Tonight i want to play computer games longer, becasue i can rest tomorrow.

more的位置主要取决于修饰的部分，修饰整个句子就一般放句末，修饰某个单词就放某个单词前。