The past perfect tense is created with the auxiliary verb had and a past participle. The past perfect tense of complain is had complained. The past perfect progressive tense is created with had + been + a present participle. The past perfect progressive of complain is had been complaining.
The past tense of "complain" is "complained."
Complain is present tense. The past tense is complained.
present because it is happening now
Complain is a regular verb, so both forms are complained.
Existed is the past tense. The past perfect tense is had existed.
The past tense of "complain" is "complained."
Complain is present tense. The past tense is complained.
present because it is happening now
Complain is a regular verb, so both forms are complained.
Existed is the past tense. The past perfect tense is had existed.
The past tense is bled, and the past perfect tense is had bled.
The past tense of sit is sat; the past perfect tense is had sat.
The past perfect tense is "had confronted".
The past perfect tense is had chosen.
The past perfect tense is had burned.
The past perfect tense is had set.
The past perfect tense is had rung.