I can strain you can strain he can strain we can strain you can strain they can strain
Forma con V-ing
I can be straining you can be straining he can be straining we can be straining you can be straining they can be straining
Perfecto
I can have strained you can have strained he can have strained we can have strained you can have strained they can have strained
Perfecto con V-ing
I can have been straining you can have been straining he can have been straining we can have been straining you can have been straining they can have been straining
Negación
Forma simple
I cannot strain you cannot strain he cannot strain we cannot strain you cannot strain they cannot strain
Forma con V-ing
I cannot be straining you cannot be straining he cannot be straining we cannot be straining you cannot be straining they cannot be straining
Perfecto
I cannot have strained you cannot have strained he cannot have strained we cannot have strained you cannot have strained they cannot have strained
Perfecto con V-ing
I cannot have been straining you cannot have been straining he cannot have been straining we cannot have been straining you cannot have been straining they cannot have been straining
Forma interrogativa
Forma simple
can I strain? can you strain? can he strain? can we strain? can you strain? can they strain?
Forma con V-ing
can I be straining? can you be straining? can he be straining? can we be straining? can you be straining? can they be straining?
Perfecto
can I have strained? can you have strained? can he have strained? can we have strained? can you have strained? can they have strained?
Perfecto con V-ing
can I have been straining? can you have been straining? can he have been straining? can we have been straining? can you have been straining? can they have been straining?
Forma interro-negativa
Forma simple
can I not strain? can you not strain? can he not strain? can we not strain? can you not strain? can they not strain?
Forma con V-ing
can I not be straining? can you not be straining? can he not be straining? can we not be straining? can you not be straining? can they not be straining?
Perfecto
can I not have strained? can you not have strained? can he not have strained? can we not have strained? can you not have strained? can they not have strained?
Perfecto con V-ing
can I not have been straining? can you not have been straining? can he not have been straining? can we not have been straining? can you not have been straining? can they not have been straining?