As
As it was snowing on Christmas, Kevin was waving to his neighbor.
Because
Because the candy bar fell through the snow, the hungry polar bear had to dig a five foot hole to find it.
Even though
Even though it was snowing, we still went camping.
when
When my dog saw snow for the first time, she love it.
before
Before Buddy fell down the ski slope, he saw a bear coming out of the trees.
