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 could not whistle
you could not whistle
he could not whistle
we could not whistle
you could not whistle
they could not whistle

V-ing form

I could not be whistling
you could not be whistling
he could not be whistling
we could not be whistling
you could not be whistling
they could not be whistling

Perfect

I could not have whistled
you could not have whistled
he could not have whistled
we could not have whistled
you could not have whistled
they could not have whistled

V-ing perfect

I could not have been whistling
you could not have been whistling
he could not have been whistling
we could not have been whistling
you could not have been whistling
they could not 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

could I not whistle?
could you not whistle?
could he not whistle?
could we not whistle?
could you not whistle?
could they not whistle?

V-ing form

could I not be whistling?
could you not be whistling?
could he not be whistling?
could we not be whistling?
could you not be whistling?
could they not be whistling?

Perfect

could I not have whistled?
could you not have whistled?
could he not have whistled?
could we not have whistled?
could you not have whistled?
could they not have whistled?

V-ing perfect

could I not have been whistling?
could you not have been whistling?
could he not have been whistling?
could we not have been whistling?
could you not have been whistling?
could they not have been whistling?

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