English verb conjugation COULD SMOOTHEN

Regular verb: smoothen - smoothened - smoothened

Affirmation

Simple form

I could smoothen
you could smoothen
he could smoothen
we could smoothen
you could smoothen
they could smoothen

V-ing form

I could be smoothening
you could be smoothening
he could be smoothening
we could be smoothening
you could be smoothening
they could be smoothening

Perfect

I could have smoothened
you could have smoothened
he could have smoothened
we could have smoothened
you could have smoothened
they could have smoothened

V-ing perfect

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

Negation

Simple form

I could not smoothen
you could not smoothen
he could not smoothen
we could not smoothen
you could not smoothen
they could not smoothen

V-ing form

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

Perfect

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

V-ing perfect

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

Interrogative form

Simple form

could I smoothen?
could you smoothen?
could he smoothen?
could we smoothen?
could you smoothen?
could they smoothen?

V-ing form

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

Perfect

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

V-ing perfect

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

Interro-negative form

Simple form

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

V-ing form

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

Perfect

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

V-ing perfect

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

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