could demodulate
Regular verb: demodulate - demodulated- demodulated

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could demodulate
you could demodulate
he could demodulate
we could demodulate
you could demodulate
they could demodulate 	I could be demodulating
you could be demodulating
he could be demodulating
we could be demodulating
you could be demodulating
they could be demodulating	I could have demodulated
you could have demodulated
he could have demodulated
we could have demodulated
you could have demodulated
they could have demodulated	I could have been demodulating
you could have been demodulating
he could have been demodulating
we could have been demodulating
you could have been demodulating
they could have been demodulating	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could not demodulate
you could not demodulate
he could not demodulate
we could not demodulate
you could not demodulate
they could not demodulate 	I could not be demodulating
you could not be demodulating
he could not be demodulating
we could not be demodulating
you could not be demodulating
they could not be demodulating	I could not have demodulated
you could not have demodulated
he could not have demodulated
we could not have demodulated
you could not have demodulated
they could not have demodulated	I could not have been demodulating
you could not have been demodulating
he could not have been demodulating
we could not have been demodulating
you could not have been demodulating
they could not have been demodulating	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I demodulate?
could you demodulate?
could he demodulate?
could we demodulate?
could you demodulate?
could they demodulate? 	could I be demodulating?
could you be demodulating?
could he be demodulating?
could we be demodulating?
could you be demodulating?
could they be demodulating? 	could I have demodulated?
could you have demodulated?
could he have demodulated?
could we have demodulated?
could you have demodulated?
could they have demodulated? 	could I have been demodulating?
could you have been demodulating?
could he have been demodulating?
could we have been demodulating?
could you have been demodulating?
could they have been demodulating? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I not demodulate?
could you not demodulate?
could he not demodulate?
could we not demodulate?
could you not demodulate?
could they not demodulate? 	could I not be demodulating?
could you not be demodulating?
could he not be demodulating?
could we not be demodulating?
could you not be demodulating?
could they not be demodulating? 	could I not have demodulated?
could you not have demodulated?
could he not have demodulated?
could we not have demodulated?
could you not have demodulated?
could they not have demodulated? 	could I not have been demodulating?
could you not have been demodulating?
could he not have been demodulating?
could we not have been demodulating?
could you not have been demodulating?
could they not have been demodulating?