Rephrase the following sentence to avoid a mixed construction: Since I have to visit my mother is why I can't go the beach.Correct the following...

1.Rephrase the following sentence to avoid a mixed construction: Since I have to visit my mother is why I can’t go the beach.

2.Correct the following run-on sentence: Normally, I don’t dance their wedding reception was an exception.

3.Correct the following run-on sentence using a different solution: Someone always forgets to bring a raincoat it’s so predictable.

4.Write an example of a run-on sentence, along with one way to correct it.