I can lave you can lave he can lave we can lave you can lave they can lave
V-ing form
I can be laving you can be laving he can be laving we can be laving you can be laving they can be laving
Perfect
I can have laved you can have laved he can have laved we can have laved you can have laved they can have laved
V-ing perfect
I can have been laving you can have been laving he can have been laving we can have been laving you can have been laving they can have been laving
Negation
Simple form
I cannot lave you cannot lave he cannot lave we cannot lave you cannot lave they cannot lave
V-ing form
I cannot be laving you cannot be laving he cannot be laving we cannot be laving you cannot be laving they cannot be laving
Perfect
I cannot have laved you cannot have laved he cannot have laved we cannot have laved you cannot have laved they cannot have laved
V-ing perfect
I cannot have been laving you cannot have been laving he cannot have been laving we cannot have been laving you cannot have been laving they cannot have been laving
Interrogative form
Simple form
can I lave? can you lave? can he lave? can we lave? can you lave? can they lave?
V-ing form
can I be laving? can you be laving? can he be laving? can we be laving? can you be laving? can they be laving?
Perfect
can I have laved? can you have laved? can he have laved? can we have laved? can you have laved? can they have laved?
V-ing perfect
can I have been laving? can you have been laving? can he have been laving? can we have been laving? can you have been laving? can they have been laving?
Interro-negative form
Simple form
can I not lave? can you not lave? can he not lave? can we not lave? can you not lave? can they not lave?
V-ing form
can I not be laving? can you not be laving? can he not be laving? can we not be laving? can you not be laving? can they not be laving?
Perfect
can I not have laved? can you not have laved? can he not have laved? can we not have laved? can you not have laved? can they not have laved?
V-ing perfect
can I not have been laving? can you not have been laving? can he not have been laving? can we not have been laving? can you not have been laving? can they not have been laving?