I can tone you can tone he can tone we can tone you can tone they can tone
V-ing form
I can be toning you can be toning he can be toning we can be toning you can be toning they can be toning
Perfect
I can have toned you can have toned he can have toned we can have toned you can have toned they can have toned
V-ing perfect
I can have been toning you can have been toning he can have been toning we can have been toning you can have been toning they can have been toning
Negation
Simple form
I cannot tone you cannot tone he cannot tone we cannot tone you cannot tone they cannot tone
V-ing form
I cannot be toning you cannot be toning he cannot be toning we cannot be toning you cannot be toning they cannot be toning
Perfect
I cannot have toned you cannot have toned he cannot have toned we cannot have toned you cannot have toned they cannot have toned
V-ing perfect
I cannot have been toning you cannot have been toning he cannot have been toning we cannot have been toning you cannot have been toning they cannot have been toning
Interrogative form
Simple form
can I tone? can you tone? can he tone? can we tone? can you tone? can they tone?
V-ing form
can I be toning? can you be toning? can he be toning? can we be toning? can you be toning? can they be toning?
Perfect
can I have toned? can you have toned? can he have toned? can we have toned? can you have toned? can they have toned?
V-ing perfect
can I have been toning? can you have been toning? can he have been toning? can we have been toning? can you have been toning? can they have been toning?
Interro-negative form
Simple form
can I not tone? can you not tone? can he not tone? can we not tone? can you not tone? can they not tone?
V-ing form
can I not be toning? can you not be toning? can he not be toning? can we not be toning? can you not be toning? can they not be toning?
Perfect
can I not have toned? can you not have toned? can he not have toned? can we not have toned? can you not have toned? can they not have toned?
V-ing perfect
can I not have been toning? can you not have been toning? can he not have been toning? can we not have been toning? can you not have been toning? can they not have been toning?