English verb conjugation
COULD ABSTRACT

Regular verb: abstract - abstracted - abstracted

Affirmation

Simple form	V-ing form
I could abstract you could abstract she could abstract we could abstract you could abstract they could abstract	I could be abstracting you could be abstracting she could be abstracting we could be abstracting you could be abstracting they could be abstracting
Perfect	V-ing perfect
I could have abstracted you could have abstracted she could have abstracted we could have abstracted you could have abstracted they could have abstracted	I could have been abstracting you could have been abstracting she could have been abstracting we could have been abstracting you could have been abstracting they could have been abstracting

Negation

Simple form	V-ing form
I couldn't abstract you couldn't abstract she couldn't abstract we couldn't abstract you couldn't abstract they couldn't abstract	I couldn't be abstracting you couldn't be abstracting she couldn't be abstracting we couldn't be abstracting you couldn't be abstracting they couldn't be abstracting
Perfect	V-ing perfect
I couldn't have abstracted you couldn't have abstracted she couldn't have abstracted we couldn't have abstracted you couldn't have abstracted they couldn't have abstracted	I couldn't have been abstracting you couldn't have been abstracting she couldn't have been abstracting we couldn't have been abstracting you couldn't have been abstracting they couldn't have been abstracting

Interrogative form

Simple form	V-ing form
could I abstract? could you abstract? could she abstract? could we abstract? could you abstract? could they abstract?	could I be abstracting? could you be abstracting? could she be abstracting? could we be abstracting? could you be abstracting? could they be abstracting?
Perfect	V-ing perfect
could I have abstracted? could you have abstracted? could she have abstracted? could we have abstracted? could you have abstracted? could they have abstracted?	could I have been abstracting? could you have been abstracting? could she have been abstracting? could we have been abstracting? could you have been abstracting? could they have been abstracting?

Interro-negative form

Simple form	V-ing form
couldn't I abstract? couldn't you abstract? couldn't she abstract? couldn't we abstract? couldn't you abstract? couldn't they abstract?	couldn't I be abstracting? couldn't you be abstracting? couldn't she be abstracting? couldn't we be abstracting? couldn't you be abstracting? couldn't they be abstracting?
Perfect	V-ing perfect
couldn't I have abstracted? couldn't you have abstracted? couldn't she have abstracted? couldn't we have abstracted? couldn't you have abstracted? couldn't they have abstracted?	couldn't I have been abstracting? couldn't you have been abstracting? couldn't she have been abstracting? couldn't we have been abstracting? couldn't you have been abstracting? couldn't they have been abstracting?