PERFECT TENSE : PPT

Present perfect tense is used for describing a past action’s effect an the present.
 Pattern I : S + have/has + been + Complement
 Pattern II : S + have/has + V3 + O/adv
Past perfect tense is a kind of tense that is used to describe an action or an event that started in a certain time in the post and completed or finished fill certain time in the past too; or past perfect tense is used to express an action or an event that had happened before the other event or action happened.
 Pattern : S + had + V3 + Complement
Present future perfect tense is used to assert an action or an event that will happened or will finished at the definite time at the future.
 Pattern I : S (except I) + will/shall + have + been + complement
 Pattern II : S + will/shall + have + V3 + O/adv
Past future perfect tense is used to assert an action or an event that will happened before or at the other event happened at the past future.
 Pattern I : S + would/should + have + been + Complement
 Pattern II : S+ would/should + have + V3 + O/adv
Time signal:

• Already
• As get
• So far
• Ever
• Many times
• Once several times
• twice