English verb conjugation
COULD HETERODYNE

Regular verb: heterodyne - heterodyned - heterodyned

Affirmation

Simple form	V-ing form
I could heterodyne you could heterodyne he could heterodyne we could heterodyne you could heterodyne they could heterodyne	I could be heterodyning you could be heterodyning he could be heterodyning we could be heterodyning you could be heterodyning they could be heterodyning
Perfect	V-ing perfect
I could have heterodyned you could have heterodyned he could have heterodyned we could have heterodyned you could have heterodyned they could have heterodyned	I could have been heterodyning you could have been heterodyning he could have been heterodyning we could have been heterodyning you could have been heterodyning they could have been heterodyning

Negation

Simple form	V-ing form
I couldn't heterodyne you couldn't heterodyne he couldn't heterodyne we couldn't heterodyne you couldn't heterodyne they couldn't heterodyne	I couldn't be heterodyning you couldn't be heterodyning he couldn't be heterodyning we couldn't be heterodyning you couldn't be heterodyning they couldn't be heterodyning
Perfect	V-ing perfect
I couldn't have heterodyned you couldn't have heterodyned he couldn't have heterodyned we couldn't have heterodyned you couldn't have heterodyned they couldn't have heterodyned	I couldn't have been heterodyning you couldn't have been heterodyning he couldn't have been heterodyning we couldn't have been heterodyning you couldn't have been heterodyning they couldn't have been heterodyning

Interrogative form

Simple form	V-ing form
could I heterodyne? could you heterodyne? could he heterodyne? could we heterodyne? could you heterodyne? could they heterodyne?	could I be heterodyning? could you be heterodyning? could he be heterodyning? could we be heterodyning? could you be heterodyning? could they be heterodyning?
Perfect	V-ing perfect
could I have heterodyned? could you have heterodyned? could he have heterodyned? could we have heterodyned? could you have heterodyned? could they have heterodyned?	could I have been heterodyning? could you have been heterodyning? could he have been heterodyning? could we have been heterodyning? could you have been heterodyning? could they have been heterodyning?

Interro-negative form

Simple form	V-ing form
couldn't I heterodyne? couldn't you heterodyne? couldn't he heterodyne? couldn't we heterodyne? couldn't you heterodyne? couldn't they heterodyne?	couldn't I be heterodyning? couldn't you be heterodyning? couldn't he be heterodyning? couldn't we be heterodyning? couldn't you be heterodyning? couldn't they be heterodyning?
Perfect	V-ing perfect
couldn't I have heterodyned? couldn't you have heterodyned? couldn't he have heterodyned? couldn't we have heterodyned? couldn't you have heterodyned? couldn't they have heterodyned?	couldn't I have been heterodyning? couldn't you have been heterodyning? couldn't he have been heterodyning? couldn't we have been heterodyning? couldn't you have been heterodyning? couldn't they have been heterodyning?