Present Perfect : ( she - he - it ) + Has + past participle ( i - we - they - you ) + Have + past participle Example : He has met many many people since i came here in June . He ( has) + (met) many many people since i came here in June . i have met many people since i came here in June . i ( have ) + ( met ) many people since i came here in June ............................................................ Past Perfect : Form : ( she - he - it -i - we - they - you ) + Had + past participle example : i Had eaten my dinner before she arrived i (Had) + (eaten) my dinner before she arrived ............................................... some words that come with Present/Past Participle: already - for - by the time - when - after - before- never - ever - so far - yet ..........................

Use "has/have/had" plus the third/participle form of the verb. For example: "He has found a new way of making money."

There are many irregular past participles so it is worth it to spend time practicing the most common ones. For example: Have you been to Iran? Have you (ever) gone to Tabriz? Has the teacher bought the equipment? Has the baby drank the milk (yet)? Have we (already) done the work on the circuit? The words in the parentheses are auxiliary or helper and can add clarification.

He has seen many sentences with present perfect tense in his lifetime. :P