because & because of

因为你的关心，我发现生活充满了希望。 1）Because you are concerned about me, I find that life is full of hope. 2）Because of your concern, I find that life is full of hope. 因为雨下得很大，那个男孩穿过树林回家了。 1）Because it rained heavily, the boy went back home through the woods. 2）Because of the heavy rain, the boy went back home through the woods.