Completed.
The past perfect tense of complete is had completed.
Yes completed is the past tense of complete.
Complete is a regular verb so add ed to make the past tensecompleted
had completed.
The irregular forms of the verb "complete" are "completed" (past tense) and "completed" (past participle).
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Slunk is the past tense of slink. For a complete conjugation of slink in all tenses, see http://conjugator.reverso.net/conjugation-english-verb-slink.html
The term "complete tense" or "perfect aspect" describes a finished action. The verb can be in the past, present or future tense. Examples of a complete tense: I ordered pizza; He picked up the suitcase; He could have eaten; They ate cookies;
the past tense of am is was and the past tense of has is had
The past tense of "has" is "had" and the past tense of "have" is "had."
Was and were are both the past tense of be. The present tense is: I am he is you are they are The past tense is: I was he was you were they were
"will be" is the future tense of "be". The past tense of "be" is "was/were".