Respuesta:
This exercise is difficult.
This exercise isn't difficult.
We're from Spain.
We aren't from Spain.
My grandmother's name's Adelaide.
My grandmother's name isn't Adelaide.
The kids are in the garden.
The kids aren't in the garden.
You're English.
You aren't English.
My car is very expensive.
My car isn't very expensive.
This is my student's notebook.
This isn't my student's notebook.
These photographs are very nice.
These photographs aren't very nice.
Jerry is twenty-five years old.
Jerry isn't twenty-five years old.
I'm fine.
I'm not fine.
He is from Mexico.
He isn't from Mexico.
You are in this class.
You aren't in this class.
They are immigrants.
They aren't immigrants.
Explicación:
- Se empleó la negación del verbo to be (ser o estar).
- Cuando se usa para tercera persona (is), la negación es is not, que en forma abreviada se escribe isn't.
- Si está escrito para el resto de pronombres personales (are), la negación es are not, cuya forma abreviada es aren't.
