12 TENSE - FORMULA

Simple Present Tense - S + V1 + O

Simple Past Tense - S + V2 + O

Simple Future Tense - S + shall / will +  V1 + O

Present Continuous Tense - S + is / am / are +  Ving + O

Past Continuous Tense - S + was / were + Ving + O

Future Continuous Tense - S + Shall be / will be +  Ving + O

Present Perfect Tense - S + have / has + V3 + O

Past Perfect Tense - S + had + V3 + O

Future Perfect Tense - S + shall have / will have + V3 + O

Present Perfect Continuous Tense - S + have been / has been + Ving + O

Past Perfect Continuous Tense - S + had been + Ving + O

Future Perfect Continuous Tense - S + shall have been / will have been + Ving + O