English verb conjugation
COULD OBSOLESCE

Regular verb: obsolesce - obsolesced - obsolesced

Affirmation

Simple form	V-ing form
I could obsolesce you could obsolesce she could obsolesce we could obsolesce you could obsolesce they could obsolesce	I could be obsolescing you could be obsolescing she could be obsolescing we could be obsolescing you could be obsolescing they could be obsolescing
Perfect	V-ing perfect
I could have obsolesced you could have obsolesced she could have obsolesced we could have obsolesced you could have obsolesced they could have obsolesced	I could have been obsolescing you could have been obsolescing she could have been obsolescing we could have been obsolescing you could have been obsolescing they could have been obsolescing

Negation

Simple form	V-ing form
I could not obsolesce you could not obsolesce she could not obsolesce we could not obsolesce you could not obsolesce they could not obsolesce	I could not be obsolescing you could not be obsolescing she could not be obsolescing we could not be obsolescing you could not be obsolescing they could not be obsolescing
Perfect	V-ing perfect
I could not have obsolesced you could not have obsolesced she could not have obsolesced we could not have obsolesced you could not have obsolesced they could not have obsolesced	I could not have been obsolescing you could not have been obsolescing she could not have been obsolescing we could not have been obsolescing you could not have been obsolescing they could not have been obsolescing

Interrogative form

Simple form	V-ing form
could I obsolesce? could you obsolesce? could she obsolesce? could we obsolesce? could you obsolesce? could they obsolesce?	could I be obsolescing? could you be obsolescing? could she be obsolescing? could we be obsolescing? could you be obsolescing? could they be obsolescing?
Perfect	V-ing perfect
could I have obsolesced? could you have obsolesced? could she have obsolesced? could we have obsolesced? could you have obsolesced? could they have obsolesced?	could I have been obsolescing? could you have been obsolescing? could she have been obsolescing? could we have been obsolescing? could you have been obsolescing? could they have been obsolescing?

Interro-negative form

Simple form	V-ing form
could I not obsolesce? could you not obsolesce? could she not obsolesce? could we not obsolesce? could you not obsolesce? could they not obsolesce?	could I not be obsolescing? could you not be obsolescing? could she not be obsolescing? could we not be obsolescing? could you not be obsolescing? could they not be obsolescing?
Perfect	V-ing perfect
could I not have obsolesced? could you not have obsolesced? could she not have obsolesced? could we not have obsolesced? could you not have obsolesced? could they not have obsolesced?	could I not have been obsolescing? could you not have been obsolescing? could she not have been obsolescing? could we not have been obsolescing? could you not have been obsolescing? could they not have been obsolescing?