Perfect Tense: PPT

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 past and completed of finished certain time in the past too; or past perfect tense is used to Express an Action or an event that had happened before that other event or action happened.

The Pattern:
(+) S + Had + V3.
(-) S + Had + Not + V3.
(?) Had + S + V3?
Ex:
(+) They had gone when she called me.
(-) They had not gone when she called me.
(?) Had they gone when she called me?
Present Perfect Tense is used for describing a past action’s effect on the present: He has arrived. Now he is here. This holds true for events that have just been secluded as well as for events that have not yet occurred.
The Pattern:
(+) S + Have/has + V3.
(-) S+ Have/has + Not + V3.
(?) Have/has + S + v3?
Ex:
(+) He has eaten your bread.
(-) He has not eaten your bread.
(?) Has he eaten your bread?