"Climbed" is the past of "climb".
The past tense is climbed.
Climbed
The past simple of "have" is "had."
The simple past is had.
Past simple and simple past are both the same thing. They are both the past tense of a verb.
The simple past and past participle are both 'had'.
The simple past and past participle are both brought.
The past simple of "study" is "studied."
"Listened" is the past simple of "listen" as well as the past participle.
Had is the past of have. A past simple sentence:I had a headache this morning
Climbed.