* "Therefore" is used to introduce a consequence, but it's not connecting two clauses properly. "Therefore" acts as a conjunction, but it requires a complete thought before it. The sentence needs a comma after "sick" and a more appropriate conjunction like "I" or "so."
Here are some grammatically correct ways to rewrite the sentence:
* "As I was sick, I could not go there." This uses a comma to separate the dependent clause ("As I was sick") from the independent clause ("I could not go there").
* "Because I was sick, I could not go there." This uses the conjunction "because" to show the cause and effect relationship.
* "I was sick, therefore I could not go there." This uses "therefore" correctly by separating it with a comma and placing it after a complete thought.
Let me know if you'd like more examples!