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 could not attempt you could not attempt he could not attempt we could not attempt you could not attempt they could not attempt	I could not be attempting you could not be attempting he could not be attempting we could not be attempting you could not be attempting they could not be attempting
Perfect	V-ing perfect
I could not have attempted you could not have attempted he could not have attempted we could not have attempted you could not have attempted they could not have attempted	I could not have been attempting you could not have been attempting he could not have been attempting we could not have been attempting you could not have been attempting they could not 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
could I not attempt? could you not attempt? could he not attempt? could we not attempt? could you not attempt? could they not attempt?	could I not be attempting? could you not be attempting? could he not be attempting? could we not be attempting? could you not be attempting? could they not be attempting?
Perfect	V-ing perfect
could I not have attempted? could you not have attempted? could he not have attempted? could we not have attempted? could you not have attempted? could they not have attempted?	could I not have been attempting? could you not have been attempting? could he not have been attempting? could we not have been attempting? could you not have been attempting? could they not have been attempting?