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 cannot lack you cannot lack he cannot lack we cannot lack you cannot lack they cannot lack
Forma con V-ing
I cannot be lacking you cannot be lacking he cannot be lacking we cannot be lacking you cannot be lacking they cannot be lacking
Perfecto
I cannot have lacked you cannot have lacked he cannot have lacked we cannot have lacked you cannot have lacked they cannot have lacked
Perfecto con V-ing
I cannot have been lacking you cannot have been lacking he cannot have been lacking we cannot have been lacking you cannot have been lacking they cannot 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 I not lack? can you not lack? can he not lack? can we not lack? can you not lack? can they not lack?
Forma con V-ing
can I not be lacking? can you not be lacking? can he not be lacking? can we not be lacking? can you not be lacking? can they not be lacking?
Perfecto
can I not have lacked? can you not have lacked? can he not have lacked? can we not have lacked? can you not have lacked? can they not have lacked?
Perfecto con V-ing
can I not have been lacking? can you not have been lacking? can he not have been lacking? can we not have been lacking? can you not have been lacking? can they not have been lacking?