I can swim. They can speak English. She can ride a bike. **Remember!** You need to add the infinitive after 'can'. I can swim. You can run fast. She can ride a bike. We can speak English. They can play the guitar. **Be careful!** For negatives you can add ‘n't’ or 'not'. I can’t drive a car. I cannot drive. Can they speak French? No, they can’t. Can they speak French? No, they cannot. **We say... We don’t say... **Can you swim? Yes I can. (NOT You can swim? Yes, I swim.) Can she ride a bike? Yes she can. (NOT She can ride a bike? Yes, she ride.) (You use 'can' at the beginning of a normal question so you say: Can + pronoun + infinitive? If you want to show surprise you can say Pronoun + can + infinitive?)