I can survey you can survey he can survey we can survey you can survey they can survey
Forma com V-ing
I can be surveying you can be surveying he can be surveying we can be surveying you can be surveying they can be surveying
Perfeito
I can have surveyed you can have surveyed he can have surveyed we can have surveyed you can have surveyed they can have surveyed
Perfeito com V-ing
I can have been surveying you can have been surveying he can have been surveying we can have been surveying you can have been surveying they can have been surveying
Negação
Forma simple
I cannot survey you cannot survey he cannot survey we cannot survey you cannot survey they cannot survey
Forma com V-ing
I cannot be surveying you cannot be surveying he cannot be surveying we cannot be surveying you cannot be surveying they cannot be surveying
Perfeito
I cannot have surveyed you cannot have surveyed he cannot have surveyed we cannot have surveyed you cannot have surveyed they cannot have surveyed
Perfeito com V-ing
I cannot have been surveying you cannot have been surveying he cannot have been surveying we cannot have been surveying you cannot have been surveying they cannot have been surveying
Forma interrogativa
Forma simple
can I survey? can you survey? can he survey? can we survey? can you survey? can they survey?
Forma com V-ing
can I be surveying? can you be surveying? can he be surveying? can we be surveying? can you be surveying? can they be surveying?
Perfeito
can I have surveyed? can you have surveyed? can he have surveyed? can we have surveyed? can you have surveyed? can they have surveyed?
Perfeito com V-ing
can I have been surveying? can you have been surveying? can he have been surveying? can we have been surveying? can you have been surveying? can they have been surveying?
Forma interro-Negação
Forma simple
can I not survey? can you not survey? can he not survey? can we not survey? can you not survey? can they not survey?
Forma com V-ing
can I not be surveying? can you not be surveying? can he not be surveying? can we not be surveying? can you not be surveying? can they not be surveying?
Perfeito
can I not have surveyed? can you not have surveyed? can he not have surveyed? can we not have surveyed? can you not have surveyed? can they not have surveyed?
Perfeito com V-ing
can I not have been surveying? can you not have been surveying? can he not have been surveying? can we not have been surveying? can you not have been surveying? can they not have been surveying?