English verb conjugation
COULD ENROLL

Regular verb: enroll - enrolled - enrolled

Affirmation

Simple form	V-ing form
I could enroll you could enroll he could enroll we could enroll you could enroll they could enroll	I could be enrolling you could be enrolling he could be enrolling we could be enrolling you could be enrolling they could be enrolling
Perfect	V-ing perfect
I could have enrolled you could have enrolled he could have enrolled we could have enrolled you could have enrolled they could have enrolled	I could have been enrolling you could have been enrolling he could have been enrolling we could have been enrolling you could have been enrolling they could have been enrolling

Negation

Simple form	V-ing form
I could not enroll you could not enroll he could not enroll we could not enroll you could not enroll they could not enroll	I could not be enrolling you could not be enrolling he could not be enrolling we could not be enrolling you could not be enrolling they could not be enrolling
Perfect	V-ing perfect
I could not have enrolled you could not have enrolled he could not have enrolled we could not have enrolled you could not have enrolled they could not have enrolled	I could not have been enrolling you could not have been enrolling he could not have been enrolling we could not have been enrolling you could not have been enrolling they could not have been enrolling

Interrogative form

Simple form	V-ing form
could I enroll? could you enroll? could he enroll? could we enroll? could you enroll? could they enroll?	could I be enrolling? could you be enrolling? could he be enrolling? could we be enrolling? could you be enrolling? could they be enrolling?
Perfect	V-ing perfect
could I have enrolled? could you have enrolled? could he have enrolled? could we have enrolled? could you have enrolled? could they have enrolled?	could I have been enrolling? could you have been enrolling? could he have been enrolling? could we have been enrolling? could you have been enrolling? could they have been enrolling?

Interro-negative form

Simple form	V-ing form
could I not enroll? could you not enroll? could he not enroll? could we not enroll? could you not enroll? could they not enroll?	could I not be enrolling? could you not be enrolling? could he not be enrolling? could we not be enrolling? could you not be enrolling? could they not be enrolling?
Perfect	V-ing perfect
could I not have enrolled? could you not have enrolled? could he not have enrolled? could we not have enrolled? could you not have enrolled? could they not have enrolled?	could I not have been enrolling? could you not have been enrolling? could he not have been enrolling? could we not have been enrolling? could you not have been enrolling? could they not have been enrolling?