Correct sentence: The beaver chews down trees with its sharp teeth.
Why this is better — step by step:
- Who? The beaver. That is the person or animal doing something.
- What does it do? It chews down trees. 'Fells' is a real word that means 'cuts down', but for a child it's clearer to say 'chews down'.
- How? With its sharp teeth. Use "its" to show the teeth belong to the beaver.
Other good ways to say it:
- Beavers chew down trees with their sharp teeth.
- The beaver fells trees with its sharp teeth. (This is correct too, but a bit formal.)
Try this: say the sentence out loud and point to the beaver, the action, and the teeth. Great job!