English verb conjugation
COULD IONIZE

Regular verb: ionize - ionized - ionized

Affirmation

Simple form	V-ing form
I could ionize you could ionize he could ionize we could ionize you could ionize they could ionize	I could be ionizing you could be ionizing he could be ionizing we could be ionizing you could be ionizing they could be ionizing
Perfect	V-ing perfect
I could have ionized you could have ionized he could have ionized we could have ionized you could have ionized they could have ionized	I could have been ionizing you could have been ionizing he could have been ionizing we could have been ionizing you could have been ionizing they could have been ionizing

Negation

Simple form	V-ing form
I couldn't ionize you couldn't ionize he couldn't ionize we couldn't ionize you couldn't ionize they couldn't ionize	I couldn't be ionizing you couldn't be ionizing he couldn't be ionizing we couldn't be ionizing you couldn't be ionizing they couldn't be ionizing
Perfect	V-ing perfect
I couldn't have ionized you couldn't have ionized he couldn't have ionized we couldn't have ionized you couldn't have ionized they couldn't have ionized	I couldn't have been ionizing you couldn't have been ionizing he couldn't have been ionizing we couldn't have been ionizing you couldn't have been ionizing they couldn't have been ionizing

Interrogative form

Simple form	V-ing form
could I ionize? could you ionize? could he ionize? could we ionize? could you ionize? could they ionize?	could I be ionizing? could you be ionizing? could he be ionizing? could we be ionizing? could you be ionizing? could they be ionizing?
Perfect	V-ing perfect
could I have ionized? could you have ionized? could he have ionized? could we have ionized? could you have ionized? could they have ionized?	could I have been ionizing? could you have been ionizing? could he have been ionizing? could we have been ionizing? could you have been ionizing? could they have been ionizing?

Interro-negative form

Simple form	V-ing form
couldn't I ionize? couldn't you ionize? couldn't he ionize? couldn't we ionize? couldn't you ionize? couldn't they ionize?	couldn't I be ionizing? couldn't you be ionizing? couldn't he be ionizing? couldn't we be ionizing? couldn't you be ionizing? couldn't they be ionizing?
Perfect	V-ing perfect
couldn't I have ionized? couldn't you have ionized? couldn't he have ionized? couldn't we have ionized? couldn't you have ionized? couldn't they have ionized?	couldn't I have been ionizing? couldn't you have been ionizing? couldn't he have been ionizing? couldn't we have been ionizing? couldn't you have been ionizing? couldn't they have been ionizing?