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What is the past tense and past perfect tense of exist?
Existed is the past tense. The past perfect tense is had existed.
What is the past tense of exist?
The past tense of "exist" is "existed."
What work refers to traces of an organism that existed in the past?
what work refers to traces of an orghanism that existed in the past
What is the past participle of thinking?
The past participle is thought.
What is the past tense of the word thought?
"Thought" is the past tense form of the verb "to think."
What is the past particle for think?
infinitive: think past: thought past participle: thought
What is the past tense of bacteria?
"Bacteria" is a noun. Nouns don't have tenses.
What is the past participle of thought?
Thought is already the past participle of "think".
Are there animals on planet mars?
No. The only place known to harbor life in the universe is Earth. Life may have once existed on Mars, but it is unlikely that it evolved past the level of bacteria.
What is the past of think?
The past of "think" is "thought."
What is past tense and past participle of think?
For the verb to think, the two are the same.The past tense is thought. The past participle is thought.Past: He thought about leaving.Past Perfect: He had thought about leaving.
What is the past tense and past participle of think?
The past tense and the past participle of think are the same: thought.
