The past perfect tense is used to express an action in the past before another action in the past. This is otherwise known as "the past in the past".
"Been" is the past participle form of the verb "be" and is used in present perfect and past perfect tenses.
Present perfect, past perfect or future perfect.
"Have" is present. "Had" is past tense
Existed is the past tense. The past perfect tense is had existed.
The past perfect tense is created with the auxiliary verb had and a past participle.Examples:The past perfect tense of walk is had walked. (Walk is a regular verb, so the past tense and past participle are the same.)The past perfect tense of break is had broken. (Break is an irregular verb. The past tense is broke, and the past participle is broken.)
"Had used" is the past perfect tense.
The past perfect tense uses the past tense of the auxiliary verb 'have' - had.
"Been" is the past participle form of the verb "be" and is used in present perfect and past perfect tenses.
Present perfect, past perfect or future perfect.
Had believed is in the past perfect tense. It is used to indicate an action that was completed before another action in the past.
"Have" is present. "Had" is past tense
Existed is the past tense. The past perfect tense is had existed.
The past perfect tense is created with the auxiliary verb had and a past participle.Examples:The past perfect tense of walk is had walked. (Walk is a regular verb, so the past tense and past participle are the same.)The past perfect tense of break is had broken. (Break is an irregular verb. The past tense is broke, and the past participle is broken.)
Have can be present simple tense: I have a new car.Have is used in present perfect tense: I have bought a new car.Had is the past tense of have.Had can be used in past simple: I had breakfast early today.had is used in past perfect: I had seen the movie before.
The simple past tense is used to talk about an action that happened in the past. The present perfect tense is used to express experience, change and a continuing situation.
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.