set
No, it is not. Rectify is a verb meaning to set right or correct.
"Set" is the correct past tense and past participle form of the verb "set." "Setted" is not a standard English word.
Depending on the context, correct is already a verb. For example, the action "to correct someone" or "to correct spelling" is an action and therefore a verb.
The correct verb would be "did inform."
done is a verb but the correct verb is did - he did.
"You have begun" is correct.
The correct past tense verb is hid.The correct present perfect verb is has hidden.
Tessellate is a verb. You were correct
Has would be the correct verb to use.
The correct past tense of the verb "Doppler" is "Dopplered."
The correct form of the verb "promise" in the sentence "He did as he promised." is already correct.
The word "set" in the given sentence should be replaced by "sat". The intransitive verb "sit" with principal parts "sit, sat, sat" indicates a motion by the subject of the sentence in which the verb occurs. The verb "set" with invariant principal parts is transitive and would require an object. The sentence as given could be correct if it were continued with "a display", but it would be more idiomatic word order to insert "a display" between "up" and "on" in the sentence given to convey this meaning.