Clean is a regular verb that means the past and past participle are formed by adding -ed = cleaned.
Present perfect is formed with: have/has + past participle
have cleaned or has cleaned.
We have cleaned the classroom. The teacher has cleaned the white board
The present perfect of "clean" is "have/has cleaned." For example, "I have cleaned the house."
The present perfect progressive tense of "clean" is "have/has been cleaning."
The present perfect of "follow" is "have followed" or "has followed."
The present perfect form of "present" is "have/has presented."
The present perfect tense of "hid" is "have/has hidden."
The present perfect tense of "exist" is "has/have existed."
The present perfect tense of clean is:I/You/We/They have cleaned.He/She/It has cleaned.
Clean is not past perfect. It's present simple. The past perfect tense of clean is had cleaned.
The present perfect progressive tense of "clean" is "have/has been cleaning."
"Have studied" is in the present perfect tense. It is formed by using the auxiliary verb "have" followed by the past participle of the main verb.
There are two forms of the present perfect tense: simple present perfect (I have eaten) and progressive present perfect (I have been eating). Both forms use "have" or "has" with the past participle of the main verb to indicate an action that started in the past and has relevance to the present.
The present perfect tense of "hid" is "have/has hidden."
have/has planned (PRESENT PERFECT)
The present perfect tense of "are" is "have been."
Has/have drawn is the present perfect of "draw".
The present perfect of "follow" is "have followed" or "has followed."
The present perfect is 'I have sung'
Present perfect tense.