could punctuate
Regular verb: punctuate - punctuated- punctuated

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could punctuate
you could punctuate
he could punctuate
we could punctuate
you could punctuate
they could punctuate 	I could be punctuating
you could be punctuating
he could be punctuating
we could be punctuating
you could be punctuating
they could be punctuating	I could have punctuated
you could have punctuated
he could have punctuated
we could have punctuated
you could have punctuated
they could have punctuated	I could have been punctuating
you could have been punctuating
he could have been punctuating
we could have been punctuating
you could have been punctuating
they could have been punctuating	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could not punctuate
you could not punctuate
he could not punctuate
we could not punctuate
you could not punctuate
they could not punctuate 	I could not be punctuating
you could not be punctuating
he could not be punctuating
we could not be punctuating
you could not be punctuating
they could not be punctuating	I could not have punctuated
you could not have punctuated
he could not have punctuated
we could not have punctuated
you could not have punctuated
they could not have punctuated	I could not have been punctuating
you could not have been punctuating
he could not have been punctuating
we could not have been punctuating
you could not have been punctuating
they could not have been punctuating	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I punctuate?
could you punctuate?
could he punctuate?
could we punctuate?
could you punctuate?
could they punctuate? 	could I be punctuating?
could you be punctuating?
could he be punctuating?
could we be punctuating?
could you be punctuating?
could they be punctuating? 	could I have punctuated?
could you have punctuated?
could he have punctuated?
could we have punctuated?
could you have punctuated?
could they have punctuated? 	could I have been punctuating?
could you have been punctuating?
could he have been punctuating?
could we have been punctuating?
could you have been punctuating?
could they have been punctuating? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I not punctuate?
could you not punctuate?
could he not punctuate?
could we not punctuate?
could you not punctuate?
could they not punctuate? 	could I not be punctuating?
could you not be punctuating?
could he not be punctuating?
could we not be punctuating?
could you not be punctuating?
could they not be punctuating? 	could I not have punctuated?
could you not have punctuated?
could he not have punctuated?
could we not have punctuated?
could you not have punctuated?
could they not have punctuated? 	could I not have been punctuating?
could you not have been punctuating?
could he not have been punctuating?
could we not have been punctuating?
could you not have been punctuating?
could they not have been punctuating?