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 couldn't clean
you couldn't clean
he couldn't clean
we couldn't clean
you couldn't clean
they couldn't clean

V-ing form

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

Perfect

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

V-ing perfect

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

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

V-ing form

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

Perfect

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

V-ing perfect

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

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