Sentence errors

Correct this run-on sentence:

"You can’t come into this room we are having a lesson."

Correct this run-on sentence:

"I need a hammer, I am going to repair the shed."

Correct this run-on sentence:

"Our parents did not like the loud music we had to stop dancing."

Correct this stringy sentence:

"Jack wasn’t feeling good, but he went to class, for he was worried about the coming exam."

Correct this stringy sentence:

"Junk food is bad for your health, and it also contains no vitamins, and damages your stomach, so people shouldn’t eat it."

Correct this stringy sentence:

"The storm ruined the crops, and it destroyed several villages, and it caused many deaths, so it was a real disaster."

Correct this sentence fragment:

"For example, the increase in the cost of renting an apartment"

Correct this sentence fragment:

"Because some students have part-time jobs."

Correct this sentence fragment:

"Many people who get married before they mature enough."

Correct these choppy sentences:

"It was raining. I didn’t have a raincoat. I had to go out."