English verb conjugation
CAN CUCKOO

Regular verb: cuckoo - cuckooed - cuckooed

Affirmation

Simple form	V-ing form
I can cuckoo you can cuckoo she can cuckoo we can cuckoo you can cuckoo they can cuckoo	I can be cuckooing you can be cuckooing she 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 she 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 she 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 cannot cuckoo you cannot cuckoo she cannot cuckoo we cannot cuckoo you cannot cuckoo they cannot cuckoo	I cannot be cuckooing you cannot be cuckooing she cannot be cuckooing we cannot be cuckooing you cannot be cuckooing they cannot be cuckooing
Perfect	V-ing perfect
I cannot have cuckooed you cannot have cuckooed she cannot have cuckooed we cannot have cuckooed you cannot have cuckooed they cannot have cuckooed	I cannot have been cuckooing you cannot have been cuckooing she cannot have been cuckooing we cannot have been cuckooing you cannot have been cuckooing they cannot have been cuckooing

Interrogative form

Simple form	V-ing form
can I cuckoo? can you cuckoo? can she cuckoo? can we cuckoo? can you cuckoo? can they cuckoo?	can I be cuckooing? can you be cuckooing? can she 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 she 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 she 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 I not cuckoo? can you not cuckoo? can she not cuckoo? can we not cuckoo? can you not cuckoo? can they not cuckoo?	can I not be cuckooing? can you not be cuckooing? can she not be cuckooing? can we not be cuckooing? can you not be cuckooing? can they not be cuckooing?
Perfect	V-ing perfect
can I not have cuckooed? can you not have cuckooed? can she not have cuckooed? can we not have cuckooed? can you not have cuckooed? can they not have cuckooed?	can I not have been cuckooing? can you not have been cuckooing? can she not have been cuckooing? can we not have been cuckooing? can you not have been cuckooing? can they not have been cuckooing?