English verb conjugation COULD UNDERACHIEVE

Regular verb: underachieve - underachieved - underachieved

Affirmation

Simple form

I could underachieve
you could underachieve
he could underachieve
we could underachieve
you could underachieve
they could underachieve

V-ing form

I could be underachieving
you could be underachieving
he could be underachieving
we could be underachieving
you could be underachieving
they could be underachieving

Perfect

I could have underachieved
you could have underachieved
he could have underachieved
we could have underachieved
you could have underachieved
they could have underachieved

V-ing perfect

I could have been underachieving
you could have been underachieving
he could have been underachieving
we could have been underachieving
you could have been underachieving
they could have been underachieving

Negation

Simple form

I could not underachieve
you could not underachieve
he could not underachieve
we could not underachieve
you could not underachieve
they could not underachieve

V-ing form

I could not be underachieving
you could not be underachieving
he could not be underachieving
we could not be underachieving
you could not be underachieving
they could not be underachieving

Perfect

I could not have underachieved
you could not have underachieved
he could not have underachieved
we could not have underachieved
you could not have underachieved
they could not have underachieved

V-ing perfect

I could not have been underachieving
you could not have been underachieving
he could not have been underachieving
we could not have been underachieving
you could not have been underachieving
they could not have been underachieving

Interrogative form

Simple form

could I underachieve?
could you underachieve?
could he underachieve?
could we underachieve?
could you underachieve?
could they underachieve?

V-ing form

could I be underachieving?
could you be underachieving?
could he be underachieving?
could we be underachieving?
could you be underachieving?
could they be underachieving?

Perfect

could I have underachieved?
could you have underachieved?
could he have underachieved?
could we have underachieved?
could you have underachieved?
could they have underachieved?

V-ing perfect

could I have been underachieving?
could you have been underachieving?
could he have been underachieving?
could we have been underachieving?
could you have been underachieving?
could they have been underachieving?

Interro-negative form

Simple form

could I not underachieve?
could you not underachieve?
could he not underachieve?
could we not underachieve?
could you not underachieve?
could they not underachieve?

V-ing form

could I not be underachieving?
could you not be underachieving?
could he not be underachieving?
could we not be underachieving?
could you not be underachieving?
could they not be underachieving?

Perfect

could I not have underachieved?
could you not have underachieved?
could he not have underachieved?
could we not have underachieved?
could you not have underachieved?
could they not have underachieved?

V-ing perfect

could I not have been underachieving?
could you not have been underachieving?
could he not have been underachieving?
could we not have been underachieving?
could you not have been underachieving?
could they not have been underachieving?

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