I always wash my hands after/because I eat something.

She is on a diet so/because she wants to lose weight.

Bill is doing his homework now but/so Mel isn't doing his homework.

My father is ill today so/but he can't go to work today.

She didn't pass her exam because/before she didn't study.

After/And my father comes,we have our dinner.

I will go to Spain and/but improve my Spanish next summer.

Kevin is very tired because/before he went to bed late last night.