I'm a vegeterian, so...
...
He didn't study for the exam, so...
...
She felt really sick, so...
...
The movie was really boring, so...
...
It was really sunny yesterday, so...
...
I'm really happy today because...
...
I can't go to the party tonight because...
...
Maria didn't buy the jeans because...
...
He's a little overweight because...
...
I live with my parents because...
...
Although she's very attractive, ...
...
Although my job isn't very well-paid...
...
It's a great restaurant, although...
...
Although her written English is excellent, ...
...
We enjoyed our vacation, although...
...
They live together, but...
...
