It rained, so we went inside.
Because it rained, we went inside.
My mum baked a cake, so we ate it.
My mum baked a cake because we wanted to eat one.
The building was strong so it didn't collapse.
The building didn't collapse because it was strong.
We were hungry, so we made some sandwiches.
Because we were hungry, we made some food.
We were bored, so we read.
Because we werw bored, we read.
