English verb conjugation
CAN CUCKOO

Regular verb: cuckoo - cuckooed - cuckooed

Affirmation

Simple form	V-ing form
I can cuckoo you can cuckoo he can cuckoo we can cuckoo you can cuckoo they can cuckoo	I can be cuckooing you can be cuckooing he can be cuckooing we can be cuckooing you can be cuckooing they can be cuckooing
Perfect	V-ing perfect
I can have cuckooed you can have cuckooed he can have cuckooed we can have cuckooed you can have cuckooed they can have cuckooed	I can have been cuckooing you can have been cuckooing he can have been cuckooing we can have been cuckooing you can have been cuckooing they can have been cuckooing

Negation

Simple form	V-ing form
I can't cuckoo you can't cuckoo he can't cuckoo we can't cuckoo you can't cuckoo they can't cuckoo	I can't be cuckooing you can't be cuckooing he can't be cuckooing we can't be cuckooing you can't be cuckooing they can't be cuckooing
Perfect	V-ing perfect
I can't have cuckooed you can't have cuckooed he can't have cuckooed we can't have cuckooed you can't have cuckooed they can't have cuckooed	I can't have been cuckooing you can't have been cuckooing he can't have been cuckooing we can't have been cuckooing you can't have been cuckooing they can't have been cuckooing

Interrogative form

Simple form	V-ing form
can I cuckoo? can you cuckoo? can he cuckoo? can we cuckoo? can you cuckoo? can they cuckoo?	can I be cuckooing? can you be cuckooing? can he be cuckooing? can we be cuckooing? can you be cuckooing? can they be cuckooing?
Perfect	V-ing perfect
can I have cuckooed? can you have cuckooed? can he have cuckooed? can we have cuckooed? can you have cuckooed? can they have cuckooed?	can I have been cuckooing? can you have been cuckooing? can he have been cuckooing? can we have been cuckooing? can you have been cuckooing? can they have been cuckooing?

Interro-negative form

Simple form	V-ing form
can't I cuckoo? can't you cuckoo? can't he cuckoo? can't we cuckoo? can't you cuckoo? can't they cuckoo?	can't I be cuckooing? can't you be cuckooing? can't he be cuckooing? can't we be cuckooing? can't you be cuckooing? can't they be cuckooing?
Perfect	V-ing perfect
can't I have cuckooed? can't you have cuckooed? can't he have cuckooed? can't we have cuckooed? can't you have cuckooed? can't they have cuckooed?	can't I have been cuckooing? can't you have been cuckooing? can't he have been cuckooing? can't we have been cuckooing? can't you have been cuckooing? can't they have been cuckooing?