I can extend you can extend he can extend we can extend you can extend they can extend
Forma com V-ing
I can be extending you can be extending he can be extending we can be extending you can be extending they can be extending
Perfeito
I can have extended you can have extended he can have extended we can have extended you can have extended they can have extended
Perfeito com V-ing
I can have been extending you can have been extending he can have been extending we can have been extending you can have been extending they can have been extending
Negação
Forma simple
I can't extend you can't extend he can't extend we can't extend you can't extend they can't extend
Forma com V-ing
I can't be extending you can't be extending he can't be extending we can't be extending you can't be extending they can't be extending
Perfeito
I can't have extended you can't have extended he can't have extended we can't have extended you can't have extended they can't have extended
Perfeito com V-ing
I can't have been extending you can't have been extending he can't have been extending we can't have been extending you can't have been extending they can't have been extending
Forma interrogativa
Forma simple
can I extend? can you extend? can he extend? can we extend? can you extend? can they extend?
Forma com V-ing
can I be extending? can you be extending? can he be extending? can we be extending? can you be extending? can they be extending?
Perfeito
can I have extended? can you have extended? can he have extended? can we have extended? can you have extended? can they have extended?
Perfeito com V-ing
can I have been extending? can you have been extending? can he have been extending? can we have been extending? can you have been extending? can they have been extending?
Forma interro-Negação
Forma simple
can't I extend? can't you extend? can't he extend? can't we extend? can't you extend? can't they extend?
Forma com V-ing
can't I be extending? can't you be extending? can't he be extending? can't we be extending? can't you be extending? can't they be extending?
Perfeito
can't I have extended? can't you have extended? can't he have extended? can't we have extended? can't you have extended? can't they have extended?
Perfeito com V-ing
can't I have been extending? can't you have been extending? can't he have been extending? can't we have been extending? can't you have been extending? can't they have been extending?