SO and THEREFORE are used to express the result of the statement before.
CAUSE --------> RESULT
EX: It started to rain, so we stopped playing tennis.
It started to rain. Therefore, we stopped playing tennis.
SO and THEREFORE are used to express the result of the statement before.
CAUSE --------> RESULT
EX: It started to rain, so we stopped playing tennis.
It started to rain. Therefore, we stopped playing tennis.