English verb conjugation
COULD NORMALIZE

Regular verb: normalize - normalized - normalized

Affirmation

Simple form	V-ing form
I could normalize you could normalize he could normalize we could normalize you could normalize they could normalize	I could be normalizing you could be normalizing he could be normalizing we could be normalizing you could be normalizing they could be normalizing
Perfect	V-ing perfect
I could have normalized you could have normalized he could have normalized we could have normalized you could have normalized they could have normalized	I could have been normalizing you could have been normalizing he could have been normalizing we could have been normalizing you could have been normalizing they could have been normalizing

Negation

Simple form	V-ing form
I couldn't normalize you couldn't normalize he couldn't normalize we couldn't normalize you couldn't normalize they couldn't normalize	I couldn't be normalizing you couldn't be normalizing he couldn't be normalizing we couldn't be normalizing you couldn't be normalizing they couldn't be normalizing
Perfect	V-ing perfect
I couldn't have normalized you couldn't have normalized he couldn't have normalized we couldn't have normalized you couldn't have normalized they couldn't have normalized	I couldn't have been normalizing you couldn't have been normalizing he couldn't have been normalizing we couldn't have been normalizing you couldn't have been normalizing they couldn't have been normalizing

Interrogative form

Simple form	V-ing form
could I normalize? could you normalize? could he normalize? could we normalize? could you normalize? could they normalize?	could I be normalizing? could you be normalizing? could he be normalizing? could we be normalizing? could you be normalizing? could they be normalizing?
Perfect	V-ing perfect
could I have normalized? could you have normalized? could he have normalized? could we have normalized? could you have normalized? could they have normalized?	could I have been normalizing? could you have been normalizing? could he have been normalizing? could we have been normalizing? could you have been normalizing? could they have been normalizing?

Interro-negative form

Simple form	V-ing form
couldn't I normalize? couldn't you normalize? couldn't he normalize? couldn't we normalize? couldn't you normalize? couldn't they normalize?	couldn't I be normalizing? couldn't you be normalizing? couldn't he be normalizing? couldn't we be normalizing? couldn't you be normalizing? couldn't they be normalizing?
Perfect	V-ing perfect
couldn't I have normalized? couldn't you have normalized? couldn't he have normalized? couldn't we have normalized? couldn't you have normalized? couldn't they have normalized?	couldn't I have been normalizing? couldn't you have been normalizing? couldn't he have been normalizing? couldn't we have been normalizing? couldn't you have been normalizing? couldn't they have been normalizing?