English verb conjugation
COULD ATTEMPT

Regular verb: attempt - attempted - attempted

Affirmation

Simple form	V-ing form
I could attempt you could attempt he could attempt we could attempt you could attempt they could attempt	I could be attempting you could be attempting he could be attempting we could be attempting you could be attempting they could be attempting
Perfect	V-ing perfect
I could have attempted you could have attempted he could have attempted we could have attempted you could have attempted they could have attempted	I could have been attempting you could have been attempting he could have been attempting we could have been attempting you could have been attempting they could have been attempting

Negation

Simple form	V-ing form
I couldn't attempt you couldn't attempt he couldn't attempt we couldn't attempt you couldn't attempt they couldn't attempt	I couldn't be attempting you couldn't be attempting he couldn't be attempting we couldn't be attempting you couldn't be attempting they couldn't be attempting
Perfect	V-ing perfect
I couldn't have attempted you couldn't have attempted he couldn't have attempted we couldn't have attempted you couldn't have attempted they couldn't have attempted	I couldn't have been attempting you couldn't have been attempting he couldn't have been attempting we couldn't have been attempting you couldn't have been attempting they couldn't have been attempting

Interrogative form

Simple form	V-ing form
could I attempt? could you attempt? could he attempt? could we attempt? could you attempt? could they attempt?	could I be attempting? could you be attempting? could he be attempting? could we be attempting? could you be attempting? could they be attempting?
Perfect	V-ing perfect
could I have attempted? could you have attempted? could he have attempted? could we have attempted? could you have attempted? could they have attempted?	could I have been attempting? could you have been attempting? could he have been attempting? could we have been attempting? could you have been attempting? could they have been attempting?

Interro-negative form

Simple form	V-ing form
couldn't I attempt? couldn't you attempt? couldn't he attempt? couldn't we attempt? couldn't you attempt? couldn't they attempt?	couldn't I be attempting? couldn't you be attempting? couldn't he be attempting? couldn't we be attempting? couldn't you be attempting? couldn't they be attempting?
Perfect	V-ing perfect
couldn't I have attempted? couldn't you have attempted? couldn't he have attempted? couldn't we have attempted? couldn't you have attempted? couldn't they have attempted?	couldn't I have been attempting? couldn't you have been attempting? couldn't he have been attempting? couldn't we have been attempting? couldn't you have been attempting? couldn't they have been attempting?