Therefore is used to show the result /effect of an action. Therefore is a cojunctive adverbs. You can use it as a transition word in sentences. Using therefore in a sentence, How to use therefore in english;
- She came first. Therefore she got a good seat.
- Mary studied hard for the chemistry exam. Therefore, she got an A+.
- There were not enough participants. Therefore, the trip was cancelled.
- I’m sleepy. Therefore, I’m going to bed.