The past participle is always used with a helping verb:
perfect tenses: had walked / have waited / had seen
passive verb phrase: am known / is eaten / are driven / was found / were seen
"Use" is a regular verb; therefore, its past participle is "used".
Used is the past participle; using is the present participle.
Present Perfect: have (has - for the 3rd pers sing) + the verb's 3rd form (the [Past] Participle). Past Perfect: had + the verb's 3rd form (the [Past] Participle). Future Perfect: will (shall) + have + the verb's 3rd form (the [Past] Participle). Past (or Perfect) Conditional: would +have + the verb's 3rd form (the [Past] Participle). Past Subjunctive (Analytical): should + have + the verb's 3rd form (the [Past] Participle). Perfect Infinitive: to have + the verb's 3rd form (the [Past] Participle). Perfect Gerund (also called Present Participle): having + the verb's 3rd form (the [Past] Participle).
No, the use of "had" is not correct after the helping verb "has" in the present perfect tense. In the present perfect tense, "has" is used with past participle verbs to indicate actions that have been completed or happened at an indefinite time in the past. So, the correct structure is "has + past participle" (e.g., "has gone," "has eaten").
use of past participle with to be
You use the past tense of a verb (e.g. sang) when the subject is being talked about in the past (the simple past tense). You use the past participle (e.g. have/has sung) when the subject is being talked about in the present (the present perfect tense). "Sung" is the past participle and "have/has" is an auxiliary verb that implies that the subject is referring to a past action in relation to the current present state.
when our tense is in the past we can use the helping verb had
The present perfect is created with have/has + a past participle. Take the verb drive, for example. The past participle is driven.I have drivenWe have drivenYou have drivenHe/she has drivenThey have driven
When you use the simple past tense or any tense which requires the past participle, you can see whether the verb is regular or irregular.Any verb that does not add -ed to the base form in the simple past and the participle is an irregular verb.
The word "reported" is the past participle, past tense of the verb to report. The past participle of the verb also functions as an adjective.Example sentences:We reported the incident to management. (verb)The reported incident led to an investigation. (adjective)
You use the past tense of a verb (e.g. sang) when the subject is being talked about in the past (the simple past tense). You use the past participle (e.g. have/has sung) when the subject is being talked about in the present (the present perfect tense). "Sung" is the past participle and "have/has" is an auxiliary verb that implies that the subject is referring to a past action in relation to the current present state.
For a regular verb let's use "answer". Present: answer, Past: answered, Past Participle: answered. For an irregular verb let's use "run". Present: run, Past: ran, PP: run.