I have performed.
Have performed
Have/Has been performing.
I/you/we/they have been performing.He/she/it has been performing.
"Perform" by itself is present tense; "will perform" is in future tense. The past tense would be "performed".
Performed is past tense. The present tense is perform, and the future tense is will perform.
Have performed
No, it is not a preposition. It is a verb, the present perfect tense of the verb "request."
Have/Has been performing.
I/you/we/they have been performing.He/she/it has been performing.
Have/Has been performing.
Present perfect tense.
The present perfect tense of "hid" is "have/has hidden."
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
The present perfect tense of "are" is "have been."
The present perfect tense of leave is have/has left. The present perfect tense of eat is have/has eaten.
"have tried" is the present perfect tense.
The present perfect tense is has/have existed.