English verb conjugation COULD CLEAN

Regular verb: clean - cleaned - cleaned

Affirmation

Simple form

I could clean
you could clean
he could clean
we could clean
you could clean
they could clean

V-ing form

I could be cleaning
you could be cleaning
he could be cleaning
we could be cleaning
you could be cleaning
they could be cleaning

Perfect

I could have cleaned
you could have cleaned
he could have cleaned
we could have cleaned
you could have cleaned
they could have cleaned

V-ing perfect

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

Negation

Simple form

I could not clean
you could not clean
he could not clean
we could not clean
you could not clean
they could not clean

V-ing form

I could not be cleaning
you could not be cleaning
he could not be cleaning
we could not be cleaning
you could not be cleaning
they could not be cleaning

Perfect

I could not have cleaned
you could not have cleaned
he could not have cleaned
we could not have cleaned
you could not have cleaned
they could not have cleaned

V-ing perfect

I could not have been cleaning
you could not have been cleaning
he could not have been cleaning
we could not have been cleaning
you could not have been cleaning
they could not have been cleaning

Interrogative form

Simple form

could I clean?
could you clean?
could he clean?
could we clean?
could you clean?
could they clean?

V-ing form

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

Perfect

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

V-ing perfect

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

Interro-negative form

Simple form

could I not clean?
could you not clean?
could he not clean?
could we not clean?
could you not clean?
could they not clean?

V-ing form

could I not be cleaning?
could you not be cleaning?
could he not be cleaning?
could we not be cleaning?
could you not be cleaning?
could they not be cleaning?

Perfect

could I not have cleaned?
could you not have cleaned?
could he not have cleaned?
could we not have cleaned?
could you not have cleaned?
could they not have cleaned?

V-ing perfect

could I not have been cleaning?
could you not have been cleaning?
could he not have been cleaning?
could we not have been cleaning?
could you not have been cleaning?
could they not have been cleaning?

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