English verb conjugation COULD WHISTLE

Regular verb: whistle - whistled - whistled

Affirmation

Simple form

I could whistle
you could whistle
he could whistle
we could whistle
you could whistle
they could whistle

V-ing form

I could be whistling
you could be whistling
he could be whistling
we could be whistling
you could be whistling
they could be whistling

Perfect

I could have whistled
you could have whistled
he could have whistled
we could have whistled
you could have whistled
they could have whistled

V-ing perfect

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

Negation

Simple form

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

V-ing form

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

Perfect

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

V-ing perfect

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

Interrogative form

Simple form

could I whistle?
could you whistle?
could he whistle?
could we whistle?
could you whistle?
could they whistle?

V-ing form

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

Perfect

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

V-ing perfect

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

Interro-negative form

Simple form

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

V-ing form

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

Perfect

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

V-ing perfect

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

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