1When do Peter go and see his friends?
do——does Peter是第三人称单数
When does Peter go and see his friends?
2We often surfs the internet on Sundays.
surfs——surf We不是第三人称单数
We often surf the internet on Sundays.
3We are going to went to the cinema to watch a film.
went to去掉 be going to 是一般将来时时态,went to 多余；
We are going to the cinema to watch a film.或者
4My friend Tim is good at swim.
swim——swimming be good at sth.（名词）
My friend Tim is good at swimming.
5China has much kinds of weather.
much——many kinds 可数 much 修饰不可数
There are many kinds of weather in China.