can creak
Verbo regular: creak - creaked- creaked

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
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	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	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
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	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	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
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? 	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? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
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? 	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?