MODAL VERBS

1. CAN

1.1. It is used in the present to indicate permission, possibility or ability

1.2. Affirmative : Subject + “Can” + Verb Present Form + Complement

1.2.1. I can drive your car.

1.3. Negative : Subject + “Can´t” + Verb Present Form + ComplemenT

1.3.1. I can´t drive your car.

1.4. Interrogative : “Can” + Subject + Verb Present Form + Complemen

1.4.1. Can I drive your car?

2. COULD

2.1. Is used to express skill in the past

2.2. Afirmative: Pronombre/Sujeto + Could + Forma Base de Verbo Principal + Complemento. .

2.2.1. Luis could play the guitar when he was young.

2.3. Negativa Pronombre/Sujeto + Couldn´t + Forma Base de Verbo Principal + Complemento. Luis couldn´t play the guitar when he was young.

2.3.1. Luis couldn´t play the guitar when he was young.

2.4. Interrogativa Could + Pronombre/Sujeto + Forma Base de Verbo Principal + Complemento.

2.4.1. Could Luis play the guitar when he was Young?