English verb conjugation COULD COMBUST

Regular verb: combust - combusted - combusted

Affirmation

Simple form

I could combust
you could combust
she could combust
we could combust
you could combust
they could combust

V-ing form

I could be combusting
you could be combusting
she could be combusting
we could be combusting
you could be combusting
they could be combusting

Perfect

I could have combusted
you could have combusted
she 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
she 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
she 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
she 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
she 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
she 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 she combust?
could we combust?
could you combust?
could they combust?

V-ing form

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

Perfect

could I have combusted?
could you have combusted?
could she 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 she 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 she 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 she 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 she 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 she 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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