English verb conjugation
CAN CREAK

Regular verb: creak - creaked - creaked

Affirmation

Simple form	V-ing form
I can creak you can creak he can creak we can creak you can creak they can creak	I can be creaking you can be creaking he can be creaking we can be creaking you can be creaking they can be creaking
Perfect	V-ing perfect
I can have creaked you can have creaked he can have creaked we can have creaked you can have creaked they can have creaked	I can have been creaking you can have been creaking he can have been creaking we can have been creaking you can have been creaking they can have been creaking

Negation

Simple form	V-ing form
I cannot creak you cannot creak he cannot creak we cannot creak you cannot creak they cannot creak	I cannot be creaking you cannot be creaking he cannot be creaking we cannot be creaking you cannot be creaking they cannot be creaking
Perfect	V-ing perfect
I cannot have creaked you cannot have creaked he cannot have creaked we cannot have creaked you cannot have creaked they cannot have creaked	I cannot have been creaking you cannot have been creaking he cannot have been creaking we cannot have been creaking you cannot have been creaking they cannot have been creaking

Interrogative form

Simple form	V-ing form
can I creak? can you creak? can he creak? can we creak? can you creak? can they creak?	can I be creaking? can you be creaking? can he be creaking? can we be creaking? can you be creaking? can they be creaking?
Perfect	V-ing perfect
can I have creaked? can you have creaked? can he have creaked? can we have creaked? can you have creaked? can they have creaked?	can I have been creaking? can you have been creaking? can he have been creaking? can we have been creaking? can you have been creaking? can they have been creaking?

Interro-negative form

Simple form	V-ing form
can I not creak? can you not creak? can he not creak? can we not creak? can you not creak? can they not creak?	can I not be creaking? can you not be creaking? can he not be creaking? can we not be creaking? can you not be creaking? can they not be creaking?
Perfect	V-ing perfect
can I not have creaked? can you not have creaked? can he not have creaked? can we not have creaked? can you not have creaked? can they not have creaked?	can I not have been creaking? can you not have been creaking? can he not have been creaking? can we not have been creaking? can you not have been creaking? can they not have been creaking?