could reduplicate
Regular verb: reduplicate - reduplicated- reduplicated

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could reduplicate
you could reduplicate
he could reduplicate
we could reduplicate
you could reduplicate
they could reduplicate 	I could be reduplicating
you could be reduplicating
he could be reduplicating
we could be reduplicating
you could be reduplicating
they could be reduplicating	I could have reduplicated
you could have reduplicated
he could have reduplicated
we could have reduplicated
you could have reduplicated
they could have reduplicated	I could have been reduplicating
you could have been reduplicating
he could have been reduplicating
we could have been reduplicating
you could have been reduplicating
they could have been reduplicating	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I couldn't reduplicate
you couldn't reduplicate
he couldn't reduplicate
we couldn't reduplicate
you couldn't reduplicate
they couldn't reduplicate 	I couldn't be reduplicating
you couldn't be reduplicating
he couldn't be reduplicating
we couldn't be reduplicating
you couldn't be reduplicating
they couldn't be reduplicating	I couldn't have reduplicated
you couldn't have reduplicated
he couldn't have reduplicated
we couldn't have reduplicated
you couldn't have reduplicated
they couldn't have reduplicated	I couldn't have been reduplicating
you couldn't have been reduplicating
he couldn't have been reduplicating
we couldn't have been reduplicating
you couldn't have been reduplicating
they couldn't have been reduplicating	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I reduplicate?
could you reduplicate?
could he reduplicate?
could we reduplicate?
could you reduplicate?
could they reduplicate? 	could I be reduplicating?
could you be reduplicating?
could he be reduplicating?
could we be reduplicating?
could you be reduplicating?
could they be reduplicating? 	could I have reduplicated?
could you have reduplicated?
could he have reduplicated?
could we have reduplicated?
could you have reduplicated?
could they have reduplicated? 	could I have been reduplicating?
could you have been reduplicating?
could he have been reduplicating?
could we have been reduplicating?
could you have been reduplicating?
could they have been reduplicating? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
couldn't I reduplicate?
couldn't you reduplicate?
couldn't he reduplicate?
couldn't we reduplicate?
couldn't you reduplicate?
couldn't they reduplicate? 	couldn't I be reduplicating?
couldn't you be reduplicating?
couldn't he be reduplicating?
couldn't we be reduplicating?
couldn't you be reduplicating?
couldn't they be reduplicating? 	couldn't I have reduplicated?
couldn't you have reduplicated?
couldn't he have reduplicated?
couldn't we have reduplicated?
couldn't you have reduplicated?
couldn't they have reduplicated? 	couldn't I have been reduplicating?
couldn't you have been reduplicating?
couldn't he have been reduplicating?
couldn't we have been reduplicating?
couldn't you have been reduplicating?
couldn't they have been reduplicating?