SHOULD / SHOULDN'T Should / shouldn't is a modal verb. It means : Debería It has the same form for all the conjugation and is followed by an infinitive without to. AFFIRMATIVE : Subject + should + infinitive I should eat more vegetables ( Yo debería comer más vegetales) NEGATIVE : Subject + shouldn't + infinitive You shouldn't smoke. It's bad for you (No deberías fumar. Es malo para tí) INTERROGATIVE : Should + subject + infinitive? Should I go to the party? (¿Debería ir a la fiesta?) No, you shouldn't / Yes, you should USES: *To give advice (dar consejo) You should take some exercise. It's good for your health (Deberías hacer ejercicio. Es bueno para tu salud) *To express an opinion You shouldn't work so hard! ( No deberías trabajar tanto) *To describe an obligation You should study harder ( Deberías estudiar más)