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 can't crinkle
you can't crinkle
he can't crinkle
we can't crinkle
you can't crinkle
they can't crinkle 	I can't be crinkling
you can't be crinkling
he can't be crinkling
we can't be crinkling
you can't be crinkling
they can't be crinkling	I can't have crinkled
you can't have crinkled
he can't have crinkled
we can't have crinkled
you can't have crinkled
they can't have crinkled	I can't have been crinkling
you can't have been crinkling
he can't have been crinkling
we can't have been crinkling
you can't have been crinkling
they can't 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't I crinkle?
can't you crinkle?
can't he crinkle?
can't we crinkle?
can't you crinkle?
can't they crinkle? 	can't I be crinkling?
can't you be crinkling?
can't he be crinkling?
can't we be crinkling?
can't you be crinkling?
can't they be crinkling? 	can't I have crinkled?
can't you have crinkled?
can't he have crinkled?
can't we have crinkled?
can't you have crinkled?
can't they have crinkled? 	can't I have been crinkling?
can't you have been crinkling?
can't he have been crinkling?
can't we have been crinkling?
can't you have been crinkling?
can't they have been crinkling?