The past tense of have one foot on a banana peel is had one foot on a banana peel.

The third-person singular simple present indicative form of have one foot on a banana peel is has one foot on a banana peel.

The present participle of have one foot on a banana peel is having one foot on a banana peel.

The past participle of have one foot on a banana peel is had one foot on a banana peel.