Catch is one of the oddball English verbs. The past-tense is caught.
I catch a fish.
He catches a fish.
I caught a fish yesterday.
We have caught several fish already.
Catch is an irregular verb the past and past participle are both caught
The past tense is caught.
caught
Caught is the past tense and past participle of catch.
Had caught is the past perfect tense of catch.
Had caught is the past perfect tense of catch.
Both past and past participle are 'caught'.
The present tense is "catch/catches". The past tense and past participle is "caught".
caught
Caught is the past participle of catch.
caught, caught
catches
Caught
Caught
Caught is already the past tense and past participle of the verb catch.