English verb conjugation COULD COMBUST

Regular verb: combust - combusted - combusted

Affirmation

Simple form

I could combust
you could combust
he could combust
we could combust
you could combust
they could combust

V-ing form

I could be combusting
you could be combusting
he could be combusting
we could be combusting
you could be combusting
they could be combusting

Perfect

I could have combusted
you could have combusted
he could have combusted
we could have combusted
you could have combusted
they could have combusted

V-ing perfect

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

Negation

Simple form

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

V-ing form

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

Perfect

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

V-ing perfect

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

Interrogative form

Simple form

could I combust?
could you combust?
could he combust?
could we combust?
could you combust?
could they combust?

V-ing form

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

Perfect

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

V-ing perfect

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

Interro-negative form

Simple form

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

V-ing form

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

Perfect

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

V-ing perfect

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

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