I can lack you can lack he can lack we can lack you can lack they can lack
Forma con V-ing
I can be lacking you can be lacking he can be lacking we can be lacking you can be lacking they can be lacking
Perfecto
I can have lacked you can have lacked he can have lacked we can have lacked you can have lacked they can have lacked
Perfecto con V-ing
I can have been lacking you can have been lacking he can have been lacking we can have been lacking you can have been lacking they can have been lacking
Negación
Forma simple
I can't lack you can't lack he can't lack we can't lack you can't lack they can't lack
Forma con V-ing
I can't be lacking you can't be lacking he can't be lacking we can't be lacking you can't be lacking they can't be lacking
Perfecto
I can't have lacked you can't have lacked he can't have lacked we can't have lacked you can't have lacked they can't have lacked
Perfecto con V-ing
I can't have been lacking you can't have been lacking he can't have been lacking we can't have been lacking you can't have been lacking they can't have been lacking
Forma interrogativa
Forma simple
can I lack? can you lack? can he lack? can we lack? can you lack? can they lack?
Forma con V-ing
can I be lacking? can you be lacking? can he be lacking? can we be lacking? can you be lacking? can they be lacking?
Perfecto
can I have lacked? can you have lacked? can he have lacked? can we have lacked? can you have lacked? can they have lacked?
Perfecto con V-ing
can I have been lacking? can you have been lacking? can he have been lacking? can we have been lacking? can you have been lacking? can they have been lacking?
Forma interro-negativa
Forma simple
can't I lack? can't you lack? can't he lack? can't we lack? can't you lack? can't they lack?
Forma con V-ing
can't I be lacking? can't you be lacking? can't he be lacking? can't we be lacking? can't you be lacking? can't they be lacking?
Perfecto
can't I have lacked? can't you have lacked? can't he have lacked? can't we have lacked? can't you have lacked? can't they have lacked?
Perfecto con V-ing
can't I have been lacking? can't you have been lacking? can't he have been lacking? can't we have been lacking? can't you have been lacking? can't they have been lacking?