Find incorrect verb tense in this sentence: He was swimming in a pool.
The verb tense in that sentence "He was swimming in a pool" is not incorrect. It is in the past continuous tense, indicating an ongoing action that was happening in the past.
Complete the following task based on the instruction and optional input provided.### Instruction:
Find incorrect verb tense in this sentence: He was swimming in a pool.

### Output:
The verb tense in that sentence "He was swimming in a pool" is not incorrect. It is in the past continuous tense, indicating an ongoing action that was happening in the past.