can crinkle
Regular verb: crinkle - crinkled- crinkled

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I can crinkle
you can crinkle
he can crinkle
we can crinkle
you can crinkle
they can crinkle 	I can be crinkling
you can be crinkling
he can be crinkling
we can be crinkling
you can be crinkling
they can be crinkling	I can have crinkled
you can have crinkled
he can have crinkled
we can have crinkled
you can have crinkled
they can have crinkled	I can have been crinkling
you can have been crinkling
he can have been crinkling
we can have been crinkling
you can have been crinkling
they can have been crinkling	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I cannot crinkle
you cannot crinkle
he cannot crinkle
we cannot crinkle
you cannot crinkle
they cannot crinkle 	I cannot be crinkling
you cannot be crinkling
he cannot be crinkling
we cannot be crinkling
you cannot be crinkling
they cannot be crinkling	I cannot have crinkled
you cannot have crinkled
he cannot have crinkled
we cannot have crinkled
you cannot have crinkled
they cannot have crinkled	I cannot have been crinkling
you cannot have been crinkling
he cannot have been crinkling
we cannot have been crinkling
you cannot have been crinkling
they cannot have been crinkling	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can I crinkle?
can you crinkle?
can he crinkle?
can we crinkle?
can you crinkle?
can they crinkle? 	can I be crinkling?
can you be crinkling?
can he be crinkling?
can we be crinkling?
can you be crinkling?
can they be crinkling? 	can I have crinkled?
can you have crinkled?
can he have crinkled?
can we have crinkled?
can you have crinkled?
can they have crinkled? 	can I have been crinkling?
can you have been crinkling?
can he have been crinkling?
can we have been crinkling?
can you have been crinkling?
can they have been crinkling? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can I not crinkle?
can you not crinkle?
can he not crinkle?
can we not crinkle?
can you not crinkle?
can they not crinkle? 	can I not be crinkling?
can you not be crinkling?
can he not be crinkling?
can we not be crinkling?
can you not be crinkling?
can they not be crinkling? 	can I not have crinkled?
can you not have crinkled?
can he not have crinkled?
can we not have crinkled?
can you not have crinkled?
can they not have crinkled? 	can I not have been crinkling?
can you not have been crinkling?
can he not have been crinkling?
can we not have been crinkling?
can you not have been crinkling?
can they not have been crinkling?