I can crack you can crack he can crack we can crack you can crack they can crack
Forma com V-ing
I can be cracking you can be cracking he can be cracking we can be cracking you can be cracking they can be cracking
Perfeito
I can have cracked you can have cracked he can have cracked we can have cracked you can have cracked they can have cracked
Perfeito com V-ing
I can have been cracking you can have been cracking he can have been cracking we can have been cracking you can have been cracking they can have been cracking
Negação
Forma simple
I can't crack you can't crack he can't crack we can't crack you can't crack they can't crack
Forma com V-ing
I can't be cracking you can't be cracking he can't be cracking we can't be cracking you can't be cracking they can't be cracking
Perfeito
I can't have cracked you can't have cracked he can't have cracked we can't have cracked you can't have cracked they can't have cracked
Perfeito com V-ing
I can't have been cracking you can't have been cracking he can't have been cracking we can't have been cracking you can't have been cracking they can't have been cracking
Forma interrogativa
Forma simple
can I crack? can you crack? can he crack? can we crack? can you crack? can they crack?
Forma com V-ing
can I be cracking? can you be cracking? can he be cracking? can we be cracking? can you be cracking? can they be cracking?
Perfeito
can I have cracked? can you have cracked? can he have cracked? can we have cracked? can you have cracked? can they have cracked?
Perfeito com V-ing
can I have been cracking? can you have been cracking? can he have been cracking? can we have been cracking? can you have been cracking? can they have been cracking?
Forma interro-Negação
Forma simple
can't I crack? can't you crack? can't he crack? can't we crack? can't you crack? can't they crack?
Forma com V-ing
can't I be cracking? can't you be cracking? can't he be cracking? can't we be cracking? can't you be cracking? can't they be cracking?
Perfeito
can't I have cracked? can't you have cracked? can't he have cracked? can't we have cracked? can't you have cracked? can't they have cracked?
Perfeito com V-ing
can't I have been cracking? can't you have been cracking? can't he have been cracking? can't we have been cracking? can't you have been cracking? can't they have been cracking?