could masticate
Regular verb: masticate - masticated- masticated

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could masticate
you could masticate
he could masticate
we could masticate
you could masticate
they could masticate 	I could be masticating
you could be masticating
he could be masticating
we could be masticating
you could be masticating
they could be masticating	I could have masticated
you could have masticated
he could have masticated
we could have masticated
you could have masticated
they could have masticated	I could have been masticating
you could have been masticating
he could have been masticating
we could have been masticating
you could have been masticating
they could have been masticating	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I couldn't masticate
you couldn't masticate
he couldn't masticate
we couldn't masticate
you couldn't masticate
they couldn't masticate 	I couldn't be masticating
you couldn't be masticating
he couldn't be masticating
we couldn't be masticating
you couldn't be masticating
they couldn't be masticating	I couldn't have masticated
you couldn't have masticated
he couldn't have masticated
we couldn't have masticated
you couldn't have masticated
they couldn't have masticated	I couldn't have been masticating
you couldn't have been masticating
he couldn't have been masticating
we couldn't have been masticating
you couldn't have been masticating
they couldn't have been masticating	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I masticate?
could you masticate?
could he masticate?
could we masticate?
could you masticate?
could they masticate? 	could I be masticating?
could you be masticating?
could he be masticating?
could we be masticating?
could you be masticating?
could they be masticating? 	could I have masticated?
could you have masticated?
could he have masticated?
could we have masticated?
could you have masticated?
could they have masticated? 	could I have been masticating?
could you have been masticating?
could he have been masticating?
could we have been masticating?
could you have been masticating?
could they have been masticating? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
couldn't I masticate?
couldn't you masticate?
couldn't he masticate?
couldn't we masticate?
couldn't you masticate?
couldn't they masticate? 	couldn't I be masticating?
couldn't you be masticating?
couldn't he be masticating?
couldn't we be masticating?
couldn't you be masticating?
couldn't they be masticating? 	couldn't I have masticated?
couldn't you have masticated?
couldn't he have masticated?
couldn't we have masticated?
couldn't you have masticated?
couldn't they have masticated? 	couldn't I have been masticating?
couldn't you have been masticating?
couldn't he have been masticating?
couldn't we have been masticating?
couldn't you have been masticating?
couldn't they have been masticating?