I can grind you can grind he can grind we can grind you can grind they can grind
Forma com V-ing
I can be grinding you can be grinding he can be grinding we can be grinding you can be grinding they can be grinding
Perfeito
I can have ground you can have ground he can have ground we can have ground you can have ground they can have ground
Perfeito com V-ing
I can have been grinding you can have been grinding he can have been grinding we can have been grinding you can have been grinding they can have been grinding
Negação
Forma simple
I can't grind you can't grind he can't grind we can't grind you can't grind they can't grind
Forma com V-ing
I can't be grinding you can't be grinding he can't be grinding we can't be grinding you can't be grinding they can't be grinding
Perfeito
I can't have ground you can't have ground he can't have ground we can't have ground you can't have ground they can't have ground
Perfeito com V-ing
I can't have been grinding you can't have been grinding he can't have been grinding we can't have been grinding you can't have been grinding they can't have been grinding
Forma interrogativa
Forma simple
can I grind? can you grind? can he grind? can we grind? can you grind? can they grind?
Forma com V-ing
can I be grinding? can you be grinding? can he be grinding? can we be grinding? can you be grinding? can they be grinding?
Perfeito
can I have ground? can you have ground? can he have ground? can we have ground? can you have ground? can they have ground?
Perfeito com V-ing
can I have been grinding? can you have been grinding? can he have been grinding? can we have been grinding? can you have been grinding? can they have been grinding?
Forma interro-Negação
Forma simple
can't I grind? can't you grind? can't he grind? can't we grind? can't you grind? can't they grind?
Forma com V-ing
can't I be grinding? can't you be grinding? can't he be grinding? can't we be grinding? can't you be grinding? can't they be grinding?
Perfeito
can't I have ground? can't you have ground? can't he have ground? can't we have ground? can't you have ground? can't they have ground?
Perfeito com V-ing
can't I have been grinding? can't you have been grinding? can't he have been grinding? can't we have been grinding? can't you have been grinding? can't they have been grinding?