English verb conjugation COULD BOX

Regular verb: box - boxed - boxed

Affirmation

Simple form

I could box
you could box
he could box
we could box
you could box
they could box

V-ing form

I could be boxing
you could be boxing
he could be boxing
we could be boxing
you could be boxing
they could be boxing

Perfect

I could have boxed
you could have boxed
he could have boxed
we could have boxed
you could have boxed
they could have boxed

V-ing perfect

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

Negation

Simple form

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

V-ing form

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

Perfect

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

V-ing perfect

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

Interrogative form

Simple form

could I box?
could you box?
could he box?
could we box?
could you box?
could they box?

V-ing form

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

Perfect

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

V-ing perfect

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

Interro-negative form

Simple form

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

V-ing form

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

Perfect

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

V-ing perfect

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

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