1. Past Tenses:
Past Simple: I ate an apple
Past Continuous: I was eating an apple
Past Perfect: I had eaten an apple
Past Perfect Continuous: I had been eating an apple
2. Present Tenses:
Present Simple: I eat an apple
Present Continuous: I am eating an apple
Present Perfect: I have eaten an apple
Present Perfect Continuous: I have been eating an apple
3. Future Tenses:
Future Simple: I will eat an apple
Future Continuous: I will be eating an apple
Future Perfect: I will have eaten an apple
Future Perfect Continuous: I will have been eating an apple