EWJ Complex Sentences

After I gave the magician a dollar, he placed it in the box.
1. After I gave the magician a dollar
2. he placed it in the box
He gave the box a shake as soon as he closed it.
1. He gave the box a shake
2. as soon as he closed it
Before he opened the box, he smiled at me.
1. Before he opened the box
2. he smiled at me
I expected a good surprise because he also winked.
1. I expected a good surprise
2. because he also winked
When he opened the box, there were two dollar bills.
1. When he opened the box
2. there were two dollar bills
If I had known the box makes more money, I would have given the magician a twenty-dollar bill.
1. If I had known the box makes more money
2. I would have given the magician a twenty-dollar bill
Because the extra dollar was part of the show, I had to give it back.
1. Because the extra dollar was part of the show
2. I had to give it back
Although it was just a trick, I still like to believe in magic.
1. Although it was just a trick
2. I still like to believe in magic
BONUS QUESTION: In general, when the dependent clause comes first in a complex sentence, do we need a comma?
1. Yes.
2. No.
BONUS QUESTION: In general, when the dependent clause appears after the independent clause in a complex sentence, do we need a comma?
1. Yes, always.
2. No, not usually.

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