1. If we pollute the water , we will have no fresh water to use in a few decades

2. I like Disney Channel because there are alot of interesting movies on it. 

3. I took part in a badminton competition last week and won (the) third prize

1.if /have/ pollute/we/ we/ fresh water/ the water,/will/to/no/use in a few decades

=>If we pollute the water, we will have no fresh water to use in a few decades

2.I/Disney Channel/ are / interesting / movies/ because/ like/ there/a lot of/on it.

=>I like Disney Channel because there are a lot of interesting films on it

3.I / won/ in /a/ took part/ last week/ competition/ and/ badminton/ third prize

=>I took part in a badminton competition last week and won third prize