English verb conjugation COULD CLEAN

Regular verb: clean - cleaned - cleaned

Affirmation

Simple form

I could clean
you could clean
she could clean
we could clean
you could clean
they could clean

V-ing form

I could be cleaning
you could be cleaning
she could be cleaning
we could be cleaning
you could be cleaning
they could be cleaning

Perfect

I could have cleaned
you could have cleaned
she 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
she 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
she 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
she 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
she 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
she 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 she clean?
could we clean?
could you clean?
could they clean?

V-ing form

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

Perfect

could I have cleaned?
could you have cleaned?
could she 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 she 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 she 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 she 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 she 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 she 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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