Help with the exercises please

couldn't

could

couldn't

could

couldn't

could

could you play chess when you were ten years old?

could you ride a bike when you were six years old?

could you send text messages when you were two years old?

could you swim when you were eight years old?

could you speak English when you left primary school?

the verb is in infinitive form.

yes.

we use 'could' for the past.