Find the irregular verb in the sentence and write its past tense form.
She swims every day.
The irregular verb in the sentence is 'swims'. Its past tense form is 'swam'.
Complete the following task based on the instruction and optional input provided.### Instruction:
Find the irregular verb in the sentence and write its past tense form.

### Input:
She swims every day.

### Output:
The irregular verb in the sentence is 'swims'. Its past tense form is 'swam'.