English verb conjugation
SHOULD WHISTLE

Regular verb: whistle - whistled - whistled

Affirmation

Simple form	V-ing form
I'd whistle you'd whistle he'd whistle we'd whistle you'd whistle they'd whistle	I'd be whistling you'd be whistling he'd be whistling we'd be whistling you'd be whistling they'd be whistling
Perfect	V-ing perfect
I should've whistled you should've whistled he should've whistled we should've whistled you should've whistled they should've whistled	I should've been whistling you should've been whistling he should've been whistling we should've been whistling you should've been whistling they should've been whistling

Negation

Simple form	V-ing form
I shouldn't whistle you shouldn't whistle he shouldn't whistle we shouldn't whistle you shouldn't whistle they shouldn't whistle	I shouldn't be whistling you shouldn't be whistling he shouldn't be whistling we shouldn't be whistling you shouldn't be whistling they shouldn't be whistling
Perfect	V-ing perfect
I shouldn't have whistled you shouldn't have whistled he shouldn't have whistled we shouldn't have whistled you shouldn't have whistled they shouldn't have whistled	I shouldn't have been whistling you shouldn't have been whistling he shouldn't have been whistling we shouldn't have been whistling you shouldn't have been whistling they shouldn't have been whistling

Interrogative form

Simple form	V-ing form
should I whistle? should you whistle? should he whistle? should we whistle? should you whistle? should they whistle?	should I be whistling? should you be whistling? should he be whistling? should we be whistling? should you be whistling? should they be whistling?
Perfect	V-ing perfect
should I have whistled? should you have whistled? should he have whistled? should we have whistled? should you have whistled? should they have whistled?	should I have been whistling? should you have been whistling? should he have been whistling? should we have been whistling? should you have been whistling? should they have been whistling?

Interro-negative form

Simple form	V-ing form
shouldn't I whistle? shouldn't you whistle? shouldn't he whistle? shouldn't we whistle? shouldn't you whistle? shouldn't they whistle?	shouldn't I be whistling? shouldn't you be whistling? shouldn't he be whistling? shouldn't we be whistling? shouldn't you be whistling? shouldn't they be whistling?
Perfect	V-ing perfect
shouldn't I have whistled? shouldn't you have whistled? shouldn't he have whistled? shouldn't we have whistled? shouldn't you have whistled? shouldn't they have whistled?	shouldn't I have been whistling? shouldn't you have been whistling? shouldn't he have been whistling? shouldn't we have been whistling? shouldn't you have been whistling? shouldn't they have been whistling?