English verb conjugation COULD SWAN

Regular verb: swan - swaned - swaned

Affirmation

Simple form

I could swan
you could swan
he could swan
we could swan
you could swan
they could swan

V-ing form

I could be swaning
you could be swaning
he could be swaning
we could be swaning
you could be swaning
they could be swaning

Perfect

I could have swaned
you could have swaned
he could have swaned
we could have swaned
you could have swaned
they could have swaned

V-ing perfect

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

Negation

Simple form

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

V-ing form

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

Perfect

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

V-ing perfect

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

Interrogative form

Simple form

could I swan?
could you swan?
could he swan?
could we swan?
could you swan?
could they swan?

V-ing form

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

Perfect

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

V-ing perfect

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

Interro-negative form

Simple form

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

V-ing form

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

Perfect

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

V-ing perfect

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

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