English verb conjugation COULD DIAGRAM

Regular verb: diagram - diagramed - diagramed

Affirmation

Simple form

I could diagram
you could diagram
he could diagram
we could diagram
you could diagram
they could diagram

V-ing form

I could be diagraming
you could be diagraming
he could be diagraming
we could be diagraming
you could be diagraming
they could be diagraming

Perfect

I could have diagramed
you could have diagramed
he could have diagramed
we could have diagramed
you could have diagramed
they could have diagramed

V-ing perfect

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

Negation

Simple form

I couldn't diagram
you couldn't diagram
he couldn't diagram
we couldn't diagram
you couldn't diagram
they couldn't diagram

V-ing form

I couldn't be diagraming
you couldn't be diagraming
he couldn't be diagraming
we couldn't be diagraming
you couldn't be diagraming
they couldn't be diagraming

Perfect

I couldn't have diagramed
you couldn't have diagramed
he couldn't have diagramed
we couldn't have diagramed
you couldn't have diagramed
they couldn't have diagramed

V-ing perfect

I couldn't have been diagraming
you couldn't have been diagraming
he couldn't have been diagraming
we couldn't have been diagraming
you couldn't have been diagraming
they couldn't have been diagraming

Interrogative form

Simple form

could I diagram?
could you diagram?
could he diagram?
could we diagram?
could you diagram?
could they diagram?

V-ing form

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

Perfect

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

V-ing perfect

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

Interro-negative form

Simple form

couldn't I diagram?
couldn't you diagram?
couldn't he diagram?
couldn't we diagram?
couldn't you diagram?
couldn't they diagram?

V-ing form

couldn't I be diagraming?
couldn't you be diagraming?
couldn't he be diagraming?
couldn't we be diagraming?
couldn't you be diagraming?
couldn't they be diagraming?

Perfect

couldn't I have diagramed?
couldn't you have diagramed?
couldn't he have diagramed?
couldn't we have diagramed?
couldn't you have diagramed?
couldn't they have diagramed?

V-ing perfect

couldn't I have been diagraming?
couldn't you have been diagraming?
couldn't he have been diagraming?
couldn't we have been diagraming?
couldn't you have been diagraming?
couldn't they have been diagraming?

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