FORMULAS OF ALL THE 12 TENSES

S + V + O || Subject + Verb + Object

• Simple Past Tense S + Past Form of the Verb + O 
• E.g. He wrote a letter.
• Past Continuous Tense S + was/were + V + ING + O 
• E.g. I was writing a letter.
•  Past Perfect Tense S + had + Past Participle (PP.) of the Verb + O 
• E.g. She had written a letter.
•  Past Perfect Continuous Tense S + had been + V + ING + O + since/for 
• E.g. We had been writing a letter since morning.
• Simple Present Tense S + V + O 
• E.g. You write a letter.
• Present Continuous Tense S + is/am/are + V + ING + O 
• E.g. She is writing a letter.
• Present Perfect Tense S + has/have + Past Participle (PP.) of the Verb + O 
• E.g. They have written a letter.
• Present Perfect Continuous Tense S + has been/have been + V + ING + O + since/for 
• E.g. You have been writing a letter for three hours.
• Simple Future Tense S + will/shall + V + O 
• E.g. We shall write a letter.
• Future Continuous Tense S + will be/shall be + V + ING + O 
• E.g. She will be cooking food.
• Future Perfect Tense S + will have/shall have + Past participle (PP.) of the Verb + O …. 
• E.g. She will have written a letter before we go.
• Future Perfect Continuous Tense S + will have been/shall have been + V + ING + O + since/for 
• E.g. They will have been writing a letter since morning.