It is the past perfect tense.
The past perfect tense is had chosen.
The perfect tense of "think" is "have thought." For example, "I have thought about it before."
No, it's a Past Tense or a (Past) Participle.
Also is an adverb and does not affect the verb tense. The past perfect tense of think is had thought.
Philosophy is a noun. Nouns don't have tenses. Perhaps you meant, "What is the past tense of philosophize?" ==> Philosophized.
The past tense is believed.
The past tense of believe is believed.
Yes it's the past tense of believe.
The past tense of to "believe" would be to have "believed".
Past tense.
"Was believed" is a verb phrase made up of the past tense verb "was" and the past participle "believed." The main verb in the phrase is "believed," while "was" serves as an auxiliary verb indicating the past tense.
The past tense is believed.
The word believed is a past tense verb. It is the past of believe.
The past tense of "believe" is "believed" and the past participle is also "believed."
Yes they are both past tense verbs.
The past perfect tense of "commit" in the sentence would be "had committed" – the detectives believed that the maid had committed the theft.
Detectives had believed that the maid had committed the theft.