Cause and result are a pair of categories that reveal the succession and mutual restriction of universally connected things in the objective world. The cause refers to the phenomenon that causes a certain phenomenon, and the effect refers to the phenomenon caused by the action of the cause and the series of conditions.
The correlative words of causal relationship are:
Because...so...; because...therefore...;
Since...then (then)...; if...then...;
Because (because )...so (therefore, therefore)...;...therefore...;
...therefore... ....;The reason... is because...;
Since (both)... then (then, then, then)... ....