English verb conjugation COULD UNDERPROP

Regular verb: underprop - underproped - underproped

Affirmation

Simple form

I could underprop
you could underprop
he could underprop
we could underprop
you could underprop
they could underprop

V-ing form

I could be underproping
you could be underproping
he could be underproping
we could be underproping
you could be underproping
they could be underproping

Perfect

I could have underproped
you could have underproped
he could have underproped
we could have underproped
you could have underproped
they could have underproped

V-ing perfect

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

Negation

Simple form

I could not underprop
you could not underprop
he could not underprop
we could not underprop
you could not underprop
they could not underprop

V-ing form

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

Perfect

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

V-ing perfect

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

Interrogative form

Simple form

could I underprop?
could you underprop?
could he underprop?
could we underprop?
could you underprop?
could they underprop?

V-ing form

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

Perfect

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

V-ing perfect

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

Interro-negative form

Simple form

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

V-ing form

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

Perfect

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

V-ing perfect

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

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