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 can't survey you can't survey he can't survey we can't survey you can't survey they can't survey
Forma com V-ing
I can't be surveying you can't be surveying he can't be surveying we can't be surveying you can't be surveying they can't be surveying
Perfeito
I can't have surveyed you can't have surveyed he can't have surveyed we can't have surveyed you can't have surveyed they can't have surveyed
Perfeito com V-ing
I can't have been surveying you can't have been surveying he can't have been surveying we can't have been surveying you can't have been surveying they can't 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't I survey? can't you survey? can't he survey? can't we survey? can't you survey? can't they survey?
Forma com V-ing
can't I be surveying? can't you be surveying? can't he be surveying? can't we be surveying? can't you be surveying? can't they be surveying?
Perfeito
can't I have surveyed? can't you have surveyed? can't he have surveyed? can't we have surveyed? can't you have surveyed? can't they have surveyed?
Perfeito com V-ing
can't I have been surveying? can't you have been surveying? can't he have been surveying? can't we have been surveying? can't you have been surveying? can't they have been surveying?