Question

The fish_in a glorious pattern. A swims swum swimms swam
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Answer 1

Answer: Swam

Step-by-step explanation:

Because it would make more sence:

The fish Swam in a glorious pattern YES

The fish swum in a glorious pattern. NO

The fish swimms in a glorious pattern. NO

Answer 2

Answer: swam

Step-by-step explanation:

Assuming it's past tense, swam would be grammatically correct.