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 can't creak you can't creak he can't creak we can't creak you can't creak they can't creak	I can't be creaking you can't be creaking he can't be creaking we can't be creaking you can't be creaking they can't be creaking
Perfect	V-ing perfect
I can't have creaked you can't have creaked he can't have creaked we can't have creaked you can't have creaked they can't have creaked	I can't have been creaking you can't have been creaking he can't have been creaking we can't have been creaking you can't have been creaking they can't 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't I creak? can't you creak? can't he creak? can't we creak? can't you creak? can't they creak?	can't I be creaking? can't you be creaking? can't he be creaking? can't we be creaking? can't you be creaking? can't they be creaking?
Perfect	V-ing perfect
can't I have creaked? can't you have creaked? can't he have creaked? can't we have creaked? can't you have creaked? can't they have creaked?	can't I have been creaking? can't you have been creaking? can't he have been creaking? can't we have been creaking? can't you have been creaking? can't they have been creaking?