I can wash you can wash he can wash we can wash you can wash they can wash
V-ing form
I can be washing you can be washing he can be washing we can be washing you can be washing they can be washing
Perfect
I can have washed you can have washed he can have washed we can have washed you can have washed they can have washed
V-ing perfect
I can have been washing you can have been washing he can have been washing we can have been washing you can have been washing they can have been washing
Negation
Simple form
I cannot wash you cannot wash he cannot wash we cannot wash you cannot wash they cannot wash
V-ing form
I cannot be washing you cannot be washing he cannot be washing we cannot be washing you cannot be washing they cannot be washing
Perfect
I cannot have washed you cannot have washed he cannot have washed we cannot have washed you cannot have washed they cannot have washed
V-ing perfect
I cannot have been washing you cannot have been washing he cannot have been washing we cannot have been washing you cannot have been washing they cannot have been washing
Interrogative form
Simple form
can I wash? can you wash? can he wash? can we wash? can you wash? can they wash?
V-ing form
can I be washing? can you be washing? can he be washing? can we be washing? can you be washing? can they be washing?
Perfect
can I have washed? can you have washed? can he have washed? can we have washed? can you have washed? can they have washed?
V-ing perfect
can I have been washing? can you have been washing? can he have been washing? can we have been washing? can you have been washing? can they have been washing?
Interro-negative form
Simple form
can I not wash? can you not wash? can he not wash? can we not wash? can you not wash? can they not wash?
V-ing form
can I not be washing? can you not be washing? can he not be washing? can we not be washing? can you not be washing? can they not be washing?
Perfect
can I not have washed? can you not have washed? can he not have washed? can we not have washed? can you not have washed? can they not have washed?
V-ing perfect
can I not have been washing? can you not have been washing? can he not have been washing? can we not have been washing? can you not have been washing? can they not have been washing?