It is present perfect. It consists of Have/has + the past participle of a verb.
Performed is past tense. The present tense is perform, and the future tense is will perform.
Had performed.
"Perform" by itself is present tense; "will perform" is in future tense. The past tense would be "performed".
There is no past tense of "performance" because it is a noun and not a verb. Only verbs have tenses.
Have performed
The verb "had performed" is in the past perfect tense.
The tense is the past perfect for the sentence Dan had already performed the song when you walked into the cafe.
Had performed is past perfect tense (already is not part of the verb phrase).walked is past simple.When past simple and past perfect are used together like this one tense (past perfect) shows something that happened before something else ( past simple). Both events are in the past.First thing that happened = Dan performed. Next thing that happened = I walked.
Already is not a verb and does not have a past tense.
Performed is past tense. The present tense is perform, and the future tense is will perform.
"I was" is already in the past tense. "I am" is present tense.
The past tense of "did" is "had." For example: "I did my homework yesterday" becomes "I had done my homework yesterday."
The present tense of "get" is "get" for the first person singular and plural (I, we) and "gets" for the third person singular (he, she, it).
Already is not a verb, so it does not have a past perfect tense.
"Has/have occurred" is the present perfect tense. "Already" is an adverb.
The tense of "have planned" is present perfect. It indicates an action that was completed in the past and has relevance to the present moment.
Did not do it -> did not do it (same past tense form)