English verb conjugation
COULD ABSTRACT

Regular verb: abstract - abstracted - abstracted

Affirmation

Simple form	V-ing form
I could abstract you could abstract he could abstract we could abstract you could abstract they could abstract	I could be abstracting you could be abstracting he 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 he 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 he 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 he 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 he 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 he 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 he 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 he abstract? could we abstract? could you abstract? could they abstract?	could I be abstracting? could you be abstracting? could he 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 he 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 he 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 he 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 he 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 he 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 he have been abstracting? couldn't we have been abstracting? couldn't you have been abstracting? couldn't they have been abstracting?