I can tub you can tub he can tub we can tub you can tub they can tub
Forma com V-ing
I can be tubbing you can be tubbing he can be tubbing we can be tubbing you can be tubbing they can be tubbing
Perfeito
I can have tubbed you can have tubbed he can have tubbed we can have tubbed you can have tubbed they can have tubbed
Perfeito com V-ing
I can have been tubbing you can have been tubbing he can have been tubbing we can have been tubbing you can have been tubbing they can have been tubbing
Negação
Forma simple
I can't tub you can't tub he can't tub we can't tub you can't tub they can't tub
Forma com V-ing
I can't be tubbing you can't be tubbing he can't be tubbing we can't be tubbing you can't be tubbing they can't be tubbing
Perfeito
I can't have tubbed you can't have tubbed he can't have tubbed we can't have tubbed you can't have tubbed they can't have tubbed
Perfeito com V-ing
I can't have been tubbing you can't have been tubbing he can't have been tubbing we can't have been tubbing you can't have been tubbing they can't have been tubbing
Forma interrogativa
Forma simple
can I tub? can you tub? can he tub? can we tub? can you tub? can they tub?
Forma com V-ing
can I be tubbing? can you be tubbing? can he be tubbing? can we be tubbing? can you be tubbing? can they be tubbing?
Perfeito
can I have tubbed? can you have tubbed? can he have tubbed? can we have tubbed? can you have tubbed? can they have tubbed?
Perfeito com V-ing
can I have been tubbing? can you have been tubbing? can he have been tubbing? can we have been tubbing? can you have been tubbing? can they have been tubbing?
Forma interro-Negação
Forma simple
can't I tub? can't you tub? can't he tub? can't we tub? can't you tub? can't they tub?
Forma com V-ing
can't I be tubbing? can't you be tubbing? can't he be tubbing? can't we be tubbing? can't you be tubbing? can't they be tubbing?
Perfeito
can't I have tubbed? can't you have tubbed? can't he have tubbed? can't we have tubbed? can't you have tubbed? can't they have tubbed?
Perfeito com V-ing
can't I have been tubbing? can't you have been tubbing? can't he have been tubbing? can't we have been tubbing? can't you have been tubbing? can't they have been tubbing?