Could wooly mammoths fly?
No, they couldn't.
Could dodos fly?
No, they couldn't.
What could saber-toothed tigers do?
They could walk, run, and jump.
Could prehistoric armadillos swim?
Yes, they could.
What could you do when you were 3 years old?
I could...
What couldn't you do when you were 5 years old?
I couldn't...
What did you eat yesterday?
I ate...
What did you wear yesterday?
I wore...
