because , because of “因为”
We stayed at home because it rained.
I did it because they asked me to do it!
They bumped her off because she knew too much.
We could not reason out which way the robbers escaped, because we were unable to find any trace of them.
We stayed at home because of the rain.
Many motorists were forced to stop over in that town because of floods.
His business went under because of competition from the large corporations.
Because of the snow, the pilot had to land the plane at an airport in another city.