English verb conjugation
COULD LEMMATIZE

Regular verb: lemmatize - lemmatized - lemmatized

Affirmation

Simple form	V-ing form
I could lemmatize you could lemmatize she could lemmatize we could lemmatize you could lemmatize they could lemmatize	I could be lemmatizing you could be lemmatizing she could be lemmatizing we could be lemmatizing you could be lemmatizing they could be lemmatizing
Perfect	V-ing perfect
I could have lemmatized you could have lemmatized she could have lemmatized we could have lemmatized you could have lemmatized they could have lemmatized	I could have been lemmatizing you could have been lemmatizing she could have been lemmatizing we could have been lemmatizing you could have been lemmatizing they could have been lemmatizing

Negation

Simple form	V-ing form
I couldn't lemmatize you couldn't lemmatize she couldn't lemmatize we couldn't lemmatize you couldn't lemmatize they couldn't lemmatize	I couldn't be lemmatizing you couldn't be lemmatizing she couldn't be lemmatizing we couldn't be lemmatizing you couldn't be lemmatizing they couldn't be lemmatizing
Perfect	V-ing perfect
I couldn't have lemmatized you couldn't have lemmatized she couldn't have lemmatized we couldn't have lemmatized you couldn't have lemmatized they couldn't have lemmatized	I couldn't have been lemmatizing you couldn't have been lemmatizing she couldn't have been lemmatizing we couldn't have been lemmatizing you couldn't have been lemmatizing they couldn't have been lemmatizing

Interrogative form

Simple form	V-ing form
could I lemmatize? could you lemmatize? could she lemmatize? could we lemmatize? could you lemmatize? could they lemmatize?	could I be lemmatizing? could you be lemmatizing? could she be lemmatizing? could we be lemmatizing? could you be lemmatizing? could they be lemmatizing?
Perfect	V-ing perfect
could I have lemmatized? could you have lemmatized? could she have lemmatized? could we have lemmatized? could you have lemmatized? could they have lemmatized?	could I have been lemmatizing? could you have been lemmatizing? could she have been lemmatizing? could we have been lemmatizing? could you have been lemmatizing? could they have been lemmatizing?

Interro-negative form

Simple form	V-ing form
couldn't I lemmatize? couldn't you lemmatize? couldn't she lemmatize? couldn't we lemmatize? couldn't you lemmatize? couldn't they lemmatize?	couldn't I be lemmatizing? couldn't you be lemmatizing? couldn't she be lemmatizing? couldn't we be lemmatizing? couldn't you be lemmatizing? couldn't they be lemmatizing?
Perfect	V-ing perfect
couldn't I have lemmatized? couldn't you have lemmatized? couldn't she have lemmatized? couldn't we have lemmatized? couldn't you have lemmatized? couldn't they have lemmatized?	couldn't I have been lemmatizing? couldn't you have been lemmatizing? couldn't she have been lemmatizing? couldn't we have been lemmatizing? couldn't you have been lemmatizing? couldn't they have been lemmatizing?