English verb conjugation
COULD DEMODULATE

Regular verb: demodulate - demodulated - demodulated

Affirmation

Simple form	V-ing form
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
Perfect	V-ing perfect
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
I couldn't demodulate you couldn't demodulate he couldn't demodulate we couldn't demodulate you couldn't demodulate they couldn't demodulate	I couldn't be demodulating you couldn't be demodulating he couldn't be demodulating we couldn't be demodulating you couldn't be demodulating they couldn't be demodulating
Perfect	V-ing perfect
I couldn't have demodulated you couldn't have demodulated he couldn't have demodulated we couldn't have demodulated you couldn't have demodulated they couldn't have demodulated	I couldn't have been demodulating you couldn't have been demodulating he couldn't have been demodulating we couldn't have been demodulating you couldn't have been demodulating they couldn't have been demodulating

Interrogative form

Simple form	V-ing form
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?
Perfect	V-ing perfect
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
couldn't I demodulate? couldn't you demodulate? couldn't he demodulate? couldn't we demodulate? couldn't you demodulate? couldn't they demodulate?	couldn't I be demodulating? couldn't you be demodulating? couldn't he be demodulating? couldn't we be demodulating? couldn't you be demodulating? couldn't they be demodulating?
Perfect	V-ing perfect
couldn't I have demodulated? couldn't you have demodulated? couldn't he have demodulated? couldn't we have demodulated? couldn't you have demodulated? couldn't they have demodulated?	couldn't I have been demodulating? couldn't you have been demodulating? couldn't he have been demodulating? couldn't we have been demodulating? couldn't you have been demodulating? couldn't they have been demodulating?