I can waggle you can waggle he can waggle we can waggle you can waggle they can waggle
V-ing form
I can be waggling you can be waggling he can be waggling we can be waggling you can be waggling they can be waggling
Perfect
I can have waggled you can have waggled he can have waggled we can have waggled you can have waggled they can have waggled
V-ing perfect
I can have been waggling you can have been waggling he can have been waggling we can have been waggling you can have been waggling they can have been waggling
Negation
Simple form
I can't waggle you can't waggle he can't waggle we can't waggle you can't waggle they can't waggle
V-ing form
I can't be waggling you can't be waggling he can't be waggling we can't be waggling you can't be waggling they can't be waggling
Perfect
I can't have waggled you can't have waggled he can't have waggled we can't have waggled you can't have waggled they can't have waggled
V-ing perfect
I can't have been waggling you can't have been waggling he can't have been waggling we can't have been waggling you can't have been waggling they can't have been waggling
Interrogative form
Simple form
can I waggle? can you waggle? can he waggle? can we waggle? can you waggle? can they waggle?
V-ing form
can I be waggling? can you be waggling? can he be waggling? can we be waggling? can you be waggling? can they be waggling?
Perfect
can I have waggled? can you have waggled? can he have waggled? can we have waggled? can you have waggled? can they have waggled?
V-ing perfect
can I have been waggling? can you have been waggling? can he have been waggling? can we have been waggling? can you have been waggling? can they have been waggling?
Interro-negative form
Simple form
can't I waggle? can't you waggle? can't he waggle? can't we waggle? can't you waggle? can't they waggle?
V-ing form
can't I be waggling? can't you be waggling? can't he be waggling? can't we be waggling? can't you be waggling? can't they be waggling?
Perfect
can't I have waggled? can't you have waggled? can't he have waggled? can't we have waggled? can't you have waggled? can't they have waggled?
V-ing perfect
can't I have been waggling? can't you have been waggling? can't he have been waggling? can't we have been waggling? can't you have been waggling? can't they have been waggling?