1) Reason:

•Since I have an early morning meeting, I need to go to bed early.

•Because it was raining heavily, the school was closed today.

2) Time:

•After she finished her work, she went for a walk.

•As soon as I wake up, I check my phone for messages.

3) Concession:

•Although I studied hard, I failed the exam.

•Despite having a lot of experience, he was not offered the job.

4) Manner:

•She sings beautifully as if she were a professional singer.

•He types quickly and accurately like a professional typist.

5) Condition:

•If it rains, we'll have to cancel the picnic.

•Unless you finish your homework, you can't go out to play.