♦ I've is short for 'I have' and including the word 'decided' you are stating that you have made a decision or come to a conclusion.

Examples:

1. I've decided to accept the job.
2. I've decided to complete my degree.
3. I've decided to change my bad habits.
4. I've decided to extend my membership at the gym.
5. I've decided to form a chess club.
6. I've decided to hand over my responsibilities.
7. I've decided to help you move.
8. I've decided to interview for the job.
9. I've decided to increase my work load.
10. I've decided to manage a store.

► Now try to make sentences by using the below structure for He, She, We, They, John, Alice etc.

Structure: Subject + have/has + decided to + verb(present form) + object

1. He has decided to switch school.
2. Jewel has decided to marry in this year.
3. They have decided to leave the station.
4. She has decided to dance.