I can execute you can execute he can execute we can execute you can execute they can execute
Forma con V-ing
I can be executing you can be executing he can be executing we can be executing you can be executing they can be executing
Perfecto
I can have executed you can have executed he can have executed we can have executed you can have executed they can have executed
Perfecto con V-ing
I can have been executing you can have been executing he can have been executing we can have been executing you can have been executing they can have been executing
Negación
Forma simple
I cannot execute you cannot execute he cannot execute we cannot execute you cannot execute they cannot execute
Forma con V-ing
I cannot be executing you cannot be executing he cannot be executing we cannot be executing you cannot be executing they cannot be executing
Perfecto
I cannot have executed you cannot have executed he cannot have executed we cannot have executed you cannot have executed they cannot have executed
Perfecto con V-ing
I cannot have been executing you cannot have been executing he cannot have been executing we cannot have been executing you cannot have been executing they cannot have been executing
Forma interrogativa
Forma simple
can I execute? can you execute? can he execute? can we execute? can you execute? can they execute?
Forma con V-ing
can I be executing? can you be executing? can he be executing? can we be executing? can you be executing? can they be executing?
Perfecto
can I have executed? can you have executed? can he have executed? can we have executed? can you have executed? can they have executed?
Perfecto con V-ing
can I have been executing? can you have been executing? can he have been executing? can we have been executing? can you have been executing? can they have been executing?
Forma interro-negativa
Forma simple
can I not execute? can you not execute? can he not execute? can we not execute? can you not execute? can they not execute?
Forma con V-ing
can I not be executing? can you not be executing? can he not be executing? can we not be executing? can you not be executing? can they not be executing?
Perfecto
can I not have executed? can you not have executed? can he not have executed? can we not have executed? can you not have executed? can they not have executed?
Perfecto con V-ing
can I not have been executing? can you not have been executing? can he not have been executing? can we not have been executing? can you not have been executing? can they not have been executing?