16 tenses

1. simple present :s + v1
2. present continuous :s + am/is/are + verb(ing)
3. simple past :s + v2
4. past continuous :s + was/were + verb(ing)
5. simple future :s + will + v1
6. future continuous :s + will be + v(ing)
7. past future :s + would + v1
8. past future continuous :s + would be + v(ing)
9. present perfect :s + have/has + v3
10. present perfect continuous :s + have/has been + v(ing)
11. past perfect :s + had + v3
12. past perfect continuous :s + had been + v(ing)
13. future perfect continuous :s + will have + v3
14. future perfect continuous :s + will have been + v(ing)
15. past future perfect :s + would have + v3
16. past future perfect continuous :s + would have been + v(ing)