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