Present perfect is formed with: have/has+past participle
The past participle of start is started
I have started my holidays. The teachers have started their holidays. = with plural subjects.
She has started her holidays. The doctor has started his holidays. = with singular subjects.
No, stop is present tense. The past perfect tense is had stopped.
The past tense of stop is stopped. The present tense of stop is stop.
Present tense
The present perfect tense is Have/Has Hidden.
The present perfect tense is has/have existed.
present tense past tense future tense present perfect tense past perfect tense future perfect tense present progressive tense past progressive tense future progressive tense present perfect progressive tense past perfect progressive tense future perfect progressive tense
Was is a past tense conjugation of be. The present perfect tense of be is have/has been.I/We/You/They have beenHe/She/It has been
The present perfect tense of "are" is "have been."
The present tense of stop is stop.
"have tried" is the present perfect tense.
The present perfect tense of leave is have/has left. The present perfect tense of eat is have/has eaten.
The present perfect tense of clap is 'have/has clapped'.