English verb conjugation COULD UNDERSTEER

Regular verb: understeer - understeered - understeered

Affirmation

Simple form

I could understeer
you could understeer
he could understeer
we could understeer
you could understeer
they could understeer

V-ing form

I could be understeering
you could be understeering
he could be understeering
we could be understeering
you could be understeering
they could be understeering

Perfect

I could have understeered
you could have understeered
he could have understeered
we could have understeered
you could have understeered
they could have understeered

V-ing perfect

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

Negation

Simple form

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

V-ing form

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

Perfect

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

V-ing perfect

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

Interrogative form

Simple form

could I understeer?
could you understeer?
could he understeer?
could we understeer?
could you understeer?
could they understeer?

V-ing form

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

Perfect

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

V-ing perfect

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

Interro-negative form

Simple form

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

V-ing form

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

Perfect

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

V-ing perfect

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

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