English verb conjugation COULD SAILPLANE

Regular verb: sailplane - sailplaned - sailplaned

Affirmation

Simple form

I could sailplane
you could sailplane
she could sailplane
we could sailplane
you could sailplane
they could sailplane

V-ing form

I could be sailplaning
you could be sailplaning
she could be sailplaning
we could be sailplaning
you could be sailplaning
they could be sailplaning

Perfect

I could have sailplaned
you could have sailplaned
she could have sailplaned
we could have sailplaned
you could have sailplaned
they could have sailplaned

V-ing perfect

I could have been sailplaning
you could have been sailplaning
she could have been sailplaning
we could have been sailplaning
you could have been sailplaning
they could have been sailplaning

Negation

Simple form

I couldn't sailplane
you couldn't sailplane
she couldn't sailplane
we couldn't sailplane
you couldn't sailplane
they couldn't sailplane

V-ing form

I couldn't be sailplaning
you couldn't be sailplaning
she couldn't be sailplaning
we couldn't be sailplaning
you couldn't be sailplaning
they couldn't be sailplaning

Perfect

I couldn't have sailplaned
you couldn't have sailplaned
she couldn't have sailplaned
we couldn't have sailplaned
you couldn't have sailplaned
they couldn't have sailplaned

V-ing perfect

I couldn't have been sailplaning
you couldn't have been sailplaning
she couldn't have been sailplaning
we couldn't have been sailplaning
you couldn't have been sailplaning
they couldn't have been sailplaning

Interrogative form

Simple form

could I sailplane?
could you sailplane?
could she sailplane?
could we sailplane?
could you sailplane?
could they sailplane?

V-ing form

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

Perfect

could I have sailplaned?
could you have sailplaned?
could she have sailplaned?
could we have sailplaned?
could you have sailplaned?
could they have sailplaned?

V-ing perfect

could I have been sailplaning?
could you have been sailplaning?
could she have been sailplaning?
could we have been sailplaning?
could you have been sailplaning?
could they have been sailplaning?

Interro-negative form

Simple form

couldn't I sailplane?
couldn't you sailplane?
couldn't she sailplane?
couldn't we sailplane?
couldn't you sailplane?
couldn't they sailplane?

V-ing form

couldn't I be sailplaning?
couldn't you be sailplaning?
couldn't she be sailplaning?
couldn't we be sailplaning?
couldn't you be sailplaning?
couldn't they be sailplaning?

Perfect

couldn't I have sailplaned?
couldn't you have sailplaned?
couldn't she have sailplaned?
couldn't we have sailplaned?
couldn't you have sailplaned?
couldn't they have sailplaned?

V-ing perfect

couldn't I have been sailplaning?
couldn't you have been sailplaning?
couldn't she have been sailplaning?
couldn't we have been sailplaning?
couldn't you have been sailplaning?
couldn't they have been sailplaning?

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