English verb conjugation COULD DECOLOURISE

Regular verb: decolourise - decolourised - decolourised

Affirmation

Simple form

I could decolourise
you could decolourise
he could decolourise
we could decolourise
you could decolourise
they could decolourise

V-ing form

I could be decolourising
you could be decolourising
he could be decolourising
we could be decolourising
you could be decolourising
they could be decolourising

Perfect

I could have decolourised
you could have decolourised
he could have decolourised
we could have decolourised
you could have decolourised
they could have decolourised

V-ing perfect

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

Negation

Simple form

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

V-ing form

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

Perfect

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

V-ing perfect

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

Interrogative form

Simple form

could I decolourise?
could you decolourise?
could he decolourise?
could we decolourise?
could you decolourise?
could they decolourise?

V-ing form

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

Perfect

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

V-ing perfect

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

Interro-negative form

Simple form

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

V-ing form

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

Perfect

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

V-ing perfect

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

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