should whistle
Regular verb: whistle - whistled- whistled

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

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I should not whistle
you should not whistle
he should not whistle
we should not whistle
you should not whistle
they should not whistle 	I should not be whistling
you should not be whistling
he should not be whistling
we should not be whistling
you should not be whistling
they should not be whistling	I should not have whistled
you should not have whistled
he should not have whistled
we should not have whistled
you should not have whistled
they should not have whistled	I should not have been whistling
you should not have been whistling
he should not have been whistling
we should not have been whistling
you should not have been whistling
they should not have been whistling	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
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? 	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 	Perfect 	V-ing perfect 	
should I not whistle?
should you not whistle?
should he not whistle?
should we not whistle?
should you not whistle?
should they not whistle? 	should I not be whistling?
should you not be whistling?
should he not be whistling?
should we not be whistling?
should you not be whistling?
should they not be whistling? 	should I not have whistled?
should you not have whistled?
should he not have whistled?
should we not have whistled?
should you not have whistled?
should they not have whistled? 	should I not have been whistling?
should you not have been whistling?
should he not have been whistling?
should we not have been whistling?
should you not have been whistling?
should they not have been whistling?