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 can't lave you can't lave he can't lave we can't lave you can't lave they can't lave
V-ing form
I can't be laving you can't be laving he can't be laving we can't be laving you can't be laving they can't be laving
Perfect
I can't have laved you can't have laved he can't have laved we can't have laved you can't have laved they can't have laved
V-ing perfect
I can't have been laving you can't have been laving he can't have been laving we can't have been laving you can't have been laving they can't 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't I lave? can't you lave? can't he lave? can't we lave? can't you lave? can't they lave?
V-ing form
can't I be laving? can't you be laving? can't he be laving? can't we be laving? can't you be laving? can't they be laving?
Perfect
can't I have laved? can't you have laved? can't he have laved? can't we have laved? can't you have laved? can't they have laved?
V-ing perfect
can't I have been laving? can't you have been laving? can't he have been laving? can't we have been laving? can't you have been laving? can't they have been laving?