If you want to go to the concert, you need your parents' permission.

If you want to go to the concert you need your parents' permission.

because 

when

but

so

after

when

so

Because the wind was so strong many trees fell in the road.

Many trees fell in the road, because the wind was so strong.

Because the wind was so strong, many trees fell in the road.

Many trees fell in the road because, the wind was so strong.

when being driving

when you driving

when driving

please tell him I am on my way

If Perry calls

so

because 

when

after

I like chocolate too

although I like chocolate too

My favorite flavor

because my brother graduates from high school the same day

I will not attend the sports banquet

my brother graduates from high school the same day

so

because

since

although