I'll go (provided) I can sit in the front.
condition
I like (the way) she sings.
manner
(Wherever) I am, I always think of you.
place
She never leaves home without a crossword (so that) she doesn't get bored.
purpose
(By the time) I get to New York, he'll be gone.
time
(Since) I have nothing to say, I shall remain silent.
reason
It rained (so) much (that) the streets were soon flooded .
result
(While) they may look cute, they don't make very good pets.
contrast
https://339efcb25eb75e967b0d-ff8eeadd950d51fd1fc939dca75b3973.ssl.cf1.rackcdn.com/assets_green.swf