| Present Perfect Tense shows to something that finished a few moment before. | Past Perfect Tense shows that one action completed before/after another action in the past. |
| The action of the Present Perfect tense is influenced by both present and past moment. | The action of the Past Perfect tense is only influenced by the past moment. |
| Have/Has and past participle form of the main verb use in Present Perfect tense. | Had and past participle form of the main verb use in Past Perfect tense. |
| Common word uses in Present Perfect tense. Example: Yet, ever, just, just-now, already etc. | Common word uses in Past Perfect tense. Example: Before, After, Hardly, No sooner etc. |
| Example: (a) We have just finished the work. (b) He has already arranged the meeting. | Example: a) He began to run after he had seen the cat. b) The patient had died before the doctor came. |
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