Réponse :
1. Jane buys beautiful clothes.
2. My parents do not speak English, sorry!
3. Her sister phones every day.
4. I am very good at German; I understand it quite well.
5. I am not good at Spanish; I do not understand it at all.
6. Does she understand Italian?
7. They have a car, they do not take the bus.
8. He has a funny gog. His name is Sugar; he plays with him all the time.
9. He's very big! He eats a lot!
10. Do you know Mr. Smith?
Explications :
Pour les phrases 1., 3., 8., 9., il suffit de rajouter un 's' à la troisième personne du singulier au present simple.
Pour les négations (2., 5., 7.) au present simple, il faut commencer par 'do + not + verbe'.
Pour la 6. et 10., on commence la question par 'do' qui à la troisième personne du present simple donne 'does' + sujet + verbe.