Structure of All 12 Tenses

Indefinite Tense
Tense Structure
Present Indefinite Subject + base verb (+s/es)
Past Indefinite Subject + past form of verb
Future Indefinite Subject + will + base verb
Continuous Tense
Tense Structure
Present Continuous Subject + am/is/are + verb+ing
Past Continuous Subject + was/were + verb+ing
Future Continuous Subject + will be + verb+ing
Perfect Tense
Tense Structure
Present Perfect Subject + has/have + past participle
Past Perfect Subject + had + past participle
Future Perfect Subject + will have + past participle
Perfect Continuous Tense
Tense Structure
Present Perfect Continuous Subject + has/have been + verb+ing
Past Perfect Continuous Subject + had been + verb+ing
Future Perfect Continuous Subject + will have been + verb+ing