The Crab and His Mother

Mamma Crab _____ to Baby Crab when she _____ that he was walking sideways. Mamma Crab said, ‘Why are you walking sideways like that, my son? You have to walk straight.’ Baby Crab replied, ‘Show me how, dear mother, and I’ll follow your example.’

Mamma Crab tried and tried, but her efforts were in vain. She could not walk straight herself. Then, she saw how foolish she had been to find fault with her child.

Fonte:Aesop’s Fables

Choose the best verbal form to have the fable completed, respectively: