Some textbooks call these the “past simple tense,” “past continuous tense,” and “past perfect tense.” But these are not actually different tenses, they are different aspects of the past tense.
In grammar, we say that these are past tense verbs in different “aspects” (simple, continuous, and perfect). Every verb in English has both a tense (past, present, future) and an aspect (simple, continuous, perfect).
Have a look at our post on aspect in English to learn more about the difference between simple, continuous, and perfect aspect!