The document discusses the modal verb "can" which is used to express ability. It can be followed by the simple form of the principal verb and is used in affirmative statements, negative statements, and questions. Examples are provided of sentence structures using "can" with subjects like "I", "you", "he", "she", "we", and "they". A list of sports and activities is also included to demonstrate vocabulary.

1. The modal verb
can

2. The verb can express a mental or physical
ability. Can is a modal verb, followed by the
simple form of the principal verb. It is used
with all the persons. The negative form of
can is cannot or the contraction can’t. the
verb can is at the beginning to the question.

3. Affirmative statements
Structure: S + can + Ppal verb + C
I can climb a tree
You can ride a bike
He can play soccer
She can take a walk
We can play the guitar
They can swim in a pool
Negative statements
Structure: S + can’t + Ppal verb + C
I can´t climb a tree
You can´t ride a bike
He can´t play soccer
She can´t take a walk
We can´t play the guitar
They can´t swim in a pool

4. Questions
Structure: Can + S + Ppal verb + C + ?
Questions Short answers
Can you speak English? Yes, I can No, I can´t
Can he play tennis? Yes, he can No, he can´t
Can she come with us? Yes, she can No, she can´t
Can they understand the lesson? Yes, they can No, they can´t

5. Vocabulary: sportsand activities
Sports M eaning Activities M eaning
Play soccer Jugar futbol Go swimming Ir a nadar
Play tennis Jugar tenis Take a walk Dar una caminata
Ride a bike M ontar bicicleta Go to dance Ir a bailar
Play a guitar Tocar una guitarra Go to the movies Ir al cine
Climbing Escalar Go shopping Ir de compras
Skating Patinar Go fishing Ir de pesca