I can execute you can execute he can execute we can execute you can execute they can execute
Forma com 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
Perfeito
I can have executed you can have executed he can have executed we can have executed you can have executed they can have executed
Perfeito com 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
Negação
Forma simple
I can't execute you can't execute he can't execute we can't execute you can't execute they can't execute
Forma com V-ing
I can't be executing you can't be executing he can't be executing we can't be executing you can't be executing they can't be executing
Perfeito
I can't have executed you can't have executed he can't have executed we can't have executed you can't have executed they can't have executed
Perfeito com V-ing
I can't have been executing you can't have been executing he can't have been executing we can't have been executing you can't have been executing they can't 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 com 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?
Perfeito
can I have executed? can you have executed? can he have executed? can we have executed? can you have executed? can they have executed?
Perfeito com 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-Negação
Forma simple
can't I execute? can't you execute? can't he execute? can't we execute? can't you execute? can't they execute?
Forma com V-ing
can't I be executing? can't you be executing? can't he be executing? can't we be executing? can't you be executing? can't they be executing?
Perfeito
can't I have executed? can't you have executed? can't he have executed? can't we have executed? can't you have executed? can't they have executed?
Perfeito com V-ing
can't I have been executing? can't you have been executing? can't he have been executing? can't we have been executing? can't you have been executing? can't they have been executing?