English verb conjugation COULD SWEETEN

Regular verb: sweeten - sweetened - sweetened

Affirmation

Simple form

I could sweeten
you could sweeten
he could sweeten
we could sweeten
you could sweeten
they could sweeten

V-ing form

I could be sweetening
you could be sweetening
he could be sweetening
we could be sweetening
you could be sweetening
they could be sweetening

Perfect

I could have sweetened
you could have sweetened
he could have sweetened
we could have sweetened
you could have sweetened
they could have sweetened

V-ing perfect

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

Negation

Simple form

I couldn't sweeten
you couldn't sweeten
he couldn't sweeten
we couldn't sweeten
you couldn't sweeten
they couldn't sweeten

V-ing form

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

Perfect

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

V-ing perfect

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

Interrogative form

Simple form

could I sweeten?
could you sweeten?
could he sweeten?
could we sweeten?
could you sweeten?
could they sweeten?

V-ing form

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

Perfect

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

V-ing perfect

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

Interro-negative form

Simple form

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

V-ing form

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

Perfect

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

V-ing perfect

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

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