Present perfect is formed with --- have/has + past participle.Because collect is a regular verb the past participle is verb + -ed = collected.So present perfect is have collected or has collected egHe has collected his pay.They have collected the rubbish early today.
If you meant what is collect in past tense, It is collected.
"Has collected" is the present perfect tense of "collect" used for third person singular subjects.
Collect is present tense.
"Has collected" is Present Perfect, because an auxiliary verb "to have" is in the present tense.
No, it's present tense. The past tense would be "The barrel collected rainwater"
The verb is is the present tense.
The past tense of did is did. The present tense of did is do. The future tense of did is will do.
The present tense of "will be" is "am/is/are." For example, "I am," "he is," "they are."
Past tense I had Present tense I have Future Tense I will have
"Has" is in present tense. The past tense is "had".
The past perfect tense is had collected.