I can contend you can contend he can contend we can contend you can contend they can contend
Forma con V-ing
I can be contending you can be contending he can be contending we can be contending you can be contending they can be contending
Perfecto
I can have contended you can have contended he can have contended we can have contended you can have contended they can have contended
Perfecto con V-ing
I can have been contending you can have been contending he can have been contending we can have been contending you can have been contending they can have been contending
Negación
Forma simple
I can't contend you can't contend he can't contend we can't contend you can't contend they can't contend
Forma con V-ing
I can't be contending you can't be contending he can't be contending we can't be contending you can't be contending they can't be contending
Perfecto
I can't have contended you can't have contended he can't have contended we can't have contended you can't have contended they can't have contended
Perfecto con V-ing
I can't have been contending you can't have been contending he can't have been contending we can't have been contending you can't have been contending they can't have been contending
Forma interrogativa
Forma simple
can I contend? can you contend? can he contend? can we contend? can you contend? can they contend?
Forma con V-ing
can I be contending? can you be contending? can he be contending? can we be contending? can you be contending? can they be contending?
Perfecto
can I have contended? can you have contended? can he have contended? can we have contended? can you have contended? can they have contended?
Perfecto con V-ing
can I have been contending? can you have been contending? can he have been contending? can we have been contending? can you have been contending? can they have been contending?
Forma interro-negativa
Forma simple
can't I contend? can't you contend? can't he contend? can't we contend? can't you contend? can't they contend?
Forma con V-ing
can't I be contending? can't you be contending? can't he be contending? can't we be contending? can't you be contending? can't they be contending?
Perfecto
can't I have contended? can't you have contended? can't he have contended? can't we have contended? can't you have contended? can't they have contended?
Perfecto con V-ing
can't I have been contending? can't you have been contending? can't he have been contending? can't we have been contending? can't you have been contending? can't they have been contending?