English verb conjugation COULD UNDERSEAL

Regular verb: underseal - undersealed - undersealed

Affirmation

Simple form

I could underseal
you could underseal
she could underseal
we could underseal
you could underseal
they could underseal

V-ing form

I could be undersealing
you could be undersealing
she could be undersealing
we could be undersealing
you could be undersealing
they could be undersealing

Perfect

I could have undersealed
you could have undersealed
she could have undersealed
we could have undersealed
you could have undersealed
they could have undersealed

V-ing perfect

I could have been undersealing
you could have been undersealing
she could have been undersealing
we could have been undersealing
you could have been undersealing
they could have been undersealing

Negation

Simple form

I couldn't underseal
you couldn't underseal
she couldn't underseal
we couldn't underseal
you couldn't underseal
they couldn't underseal

V-ing form

I couldn't be undersealing
you couldn't be undersealing
she couldn't be undersealing
we couldn't be undersealing
you couldn't be undersealing
they couldn't be undersealing

Perfect

I couldn't have undersealed
you couldn't have undersealed
she couldn't have undersealed
we couldn't have undersealed
you couldn't have undersealed
they couldn't have undersealed

V-ing perfect

I couldn't have been undersealing
you couldn't have been undersealing
she couldn't have been undersealing
we couldn't have been undersealing
you couldn't have been undersealing
they couldn't have been undersealing

Interrogative form

Simple form

could I underseal?
could you underseal?
could she underseal?
could we underseal?
could you underseal?
could they underseal?

V-ing form

could I be undersealing?
could you be undersealing?
could she be undersealing?
could we be undersealing?
could you be undersealing?
could they be undersealing?

Perfect

could I have undersealed?
could you have undersealed?
could she have undersealed?
could we have undersealed?
could you have undersealed?
could they have undersealed?

V-ing perfect

could I have been undersealing?
could you have been undersealing?
could she have been undersealing?
could we have been undersealing?
could you have been undersealing?
could they have been undersealing?

Interro-negative form

Simple form

couldn't I underseal?
couldn't you underseal?
couldn't she underseal?
couldn't we underseal?
couldn't you underseal?
couldn't they underseal?

V-ing form

couldn't I be undersealing?
couldn't you be undersealing?
couldn't she be undersealing?
couldn't we be undersealing?
couldn't you be undersealing?
couldn't they be undersealing?

Perfect

couldn't I have undersealed?
couldn't you have undersealed?
couldn't she have undersealed?
couldn't we have undersealed?
couldn't you have undersealed?
couldn't they have undersealed?

V-ing perfect

couldn't I have been undersealing?
couldn't you have been undersealing?
couldn't she have been undersealing?
couldn't we have been undersealing?
couldn't you have been undersealing?
couldn't they have been undersealing?

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