It looks like you are asking for a short formula or trick to remember tenses,here is a simple structure:

 It looks like you are asking for a short formula or trick to remember tenses,here is a simple structure:

12 Tenses with Formula
1. Present Tense
Present Indefinite: Sub + V¹ + s/es (He eats.)
Present Continuous: Sub + am/is/are + V¹ + ing (He is eating.)
Present Perfect: Sub + has/have + V³ (He has eaten.)
Present Perfect Continuous: Sub + has/have been + V¹ + ing (He has been eating.)

2. Past Tense
Past Indefinite: Sub + V² (He ate.)
Past Continuous: Sub + was/were + V¹ + ing (He was eating.)
Past Perfect: Sub + had + V³ (He had eaten.)
Past Perfect Continuous: Sub + had been + V¹ + ing (He had been eating.)

3. Future Tense
Future Indefinite: Sub + will/shall + V¹ (He will eat.)
Future Continuous: Sub + will/shall be + V¹ + ing (He will be eating.)
Future Perfect: Sub + will/shall have + V³ (He will have eaten.)
Future Perfect Continuous: Sub + will/shall have been + V¹ + ing (He will have been eating.)

This is a short formula to quickly understand all 12 English tenses. Let me
 know if you need any modifications!