must cocoon
Regular verb: cocoon - cocooned- cocooned

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must cocoon
you must cocoon
he must cocoon
we must cocoon
you must cocoon
they must cocoon 	I must be cocooning
you must be cocooning
he must be cocooning
we must be cocooning
you must be cocooning
they must be cocooning	I must have cocooned
you must have cocooned
he must have cocooned
we must have cocooned
you must have cocooned
they must have cocooned	I must have been cocooning
you must have been cocooning
he must have been cocooning
we must have been cocooning
you must have been cocooning
they must have been cocooning	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must not cocoon
you must not cocoon
he must not cocoon
we must not cocoon
you must not cocoon
they must not cocoon 	I must not be cocooning
you must not be cocooning
he must not be cocooning
we must not be cocooning
you must not be cocooning
they must not be cocooning	I must not have cocooned
you must not have cocooned
he must not have cocooned
we must not have cocooned
you must not have cocooned
they must not have cocooned	I must not have been cocooning
you must not have been cocooning
he must not have been cocooning
we must not have been cocooning
you must not have been cocooning
they must not have been cocooning	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I cocoon?
must you cocoon?
must he cocoon?
must we cocoon?
must you cocoon?
must they cocoon? 	must I be cocooning?
must you be cocooning?
must he be cocooning?
must we be cocooning?
must you be cocooning?
must they be cocooning? 	must I have cocooned?
must you have cocooned?
must he have cocooned?
must we have cocooned?
must you have cocooned?
must they have cocooned? 	must I have been cocooning?
must you have been cocooning?
must he have been cocooning?
must we have been cocooning?
must you have been cocooning?
must they have been cocooning? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I not cocoon?
must you not cocoon?
must he not cocoon?
must we not cocoon?
must you not cocoon?
must they not cocoon? 	must I not be cocooning?
must you not be cocooning?
must he not be cocooning?
must we not be cocooning?
must you not be cocooning?
must they not be cocooning? 	must I not have cocooned?
must you not have cocooned?
must he not have cocooned?
must we not have cocooned?
must you not have cocooned?
must they not have cocooned? 	must I not have been cocooning?
must you not have been cocooning?
must he not have been cocooning?
must we not have been cocooning?
must you not have been cocooning?
must they not have been cocooning?