I can buttress you can buttress he can buttress we can buttress you can buttress they can buttress
Forma com V-ing
I can be buttressing you can be buttressing he can be buttressing we can be buttressing you can be buttressing they can be buttressing
Perfeito
I can have buttressed you can have buttressed he can have buttressed we can have buttressed you can have buttressed they can have buttressed
Perfeito com V-ing
I can have been buttressing you can have been buttressing he can have been buttressing we can have been buttressing you can have been buttressing they can have been buttressing
Negação
Forma simple
I can't buttress you can't buttress he can't buttress we can't buttress you can't buttress they can't buttress
Forma com V-ing
I can't be buttressing you can't be buttressing he can't be buttressing we can't be buttressing you can't be buttressing they can't be buttressing
Perfeito
I can't have buttressed you can't have buttressed he can't have buttressed we can't have buttressed you can't have buttressed they can't have buttressed
Perfeito com V-ing
I can't have been buttressing you can't have been buttressing he can't have been buttressing we can't have been buttressing you can't have been buttressing they can't have been buttressing
Forma interrogativa
Forma simple
can I buttress? can you buttress? can he buttress? can we buttress? can you buttress? can they buttress?
Forma com V-ing
can I be buttressing? can you be buttressing? can he be buttressing? can we be buttressing? can you be buttressing? can they be buttressing?
Perfeito
can I have buttressed? can you have buttressed? can he have buttressed? can we have buttressed? can you have buttressed? can they have buttressed?
Perfeito com V-ing
can I have been buttressing? can you have been buttressing? can he have been buttressing? can we have been buttressing? can you have been buttressing? can they have been buttressing?
Forma interro-Negação
Forma simple
can't I buttress? can't you buttress? can't he buttress? can't we buttress? can't you buttress? can't they buttress?
Forma com V-ing
can't I be buttressing? can't you be buttressing? can't he be buttressing? can't we be buttressing? can't you be buttressing? can't they be buttressing?
Perfeito
can't I have buttressed? can't you have buttressed? can't he have buttressed? can't we have buttressed? can't you have buttressed? can't they have buttressed?
Perfeito com V-ing
can't I have been buttressing? can't you have been buttressing? can't he have been buttressing? can't we have been buttressing? can't you have been buttressing? can't they have been buttressing?