English verb conjugation COULD TIER

Regular verb: tier - tiered - tiered

Affirmation

Simple form

I could tier
you could tier
he could tier
we could tier
you could tier
they could tier

V-ing form

I could be tiering
you could be tiering
he could be tiering
we could be tiering
you could be tiering
they could be tiering

Perfect

I could have tiered
you could have tiered
he could have tiered
we could have tiered
you could have tiered
they could have tiered

V-ing perfect

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

Negation

Simple form

I could not tier
you could not tier
he could not tier
we could not tier
you could not tier
they could not tier

V-ing form

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

Perfect

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

V-ing perfect

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

Interrogative form

Simple form

could I tier?
could you tier?
could he tier?
could we tier?
could you tier?
could they tier?

V-ing form

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

Perfect

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

V-ing perfect

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

Interro-negative form

Simple form

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

V-ing form

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

Perfect

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

V-ing perfect

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

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