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 couldn't smoothen
you couldn't smoothen
he couldn't smoothen
we couldn't smoothen
you couldn't smoothen
they couldn't smoothen

V-ing form

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

Perfect

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

V-ing perfect

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

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

V-ing form

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

Perfect

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

V-ing perfect

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

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