Preciso de ajuda para responder, pois não estou entendendo!

Greetings!.
1.Donna and Katya "can" speak English, but they "can't" speak Spanish
2.Adam "can" sing, but he "can't" dance
3. Ricardo "can" draw a picture, but he "can't" create a web page
4. Marisa "can" sing, but she "can't" play an instrument
5.Katya and Jake "can" make a sandwich, but they "can't" make a cake
Espero ter ajudado!.