should fret
Regular verb: fret - fretted- fretted

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I should fret
you should fret
he should fret
we should fret
you should fret
they should fret 	I should be fretting
you should be fretting
he should be fretting
we should be fretting
you should be fretting
they should be fretting	I should have fretted
you should have fretted
he should have fretted
we should have fretted
you should have fretted
they should have fretted	I should have been fretting
you should have been fretting
he should have been fretting
we should have been fretting
you should have been fretting
they should have been fretting	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I should not fret
you should not fret
he should not fret
we should not fret
you should not fret
they should not fret 	I should not be fretting
you should not be fretting
he should not be fretting
we should not be fretting
you should not be fretting
they should not be fretting	I should not have fretted
you should not have fretted
he should not have fretted
we should not have fretted
you should not have fretted
they should not have fretted	I should not have been fretting
you should not have been fretting
he should not have been fretting
we should not have been fretting
you should not have been fretting
they should not have been fretting	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
should I fret?
should you fret?
should he fret?
should we fret?
should you fret?
should they fret? 	should I be fretting?
should you be fretting?
should he be fretting?
should we be fretting?
should you be fretting?
should they be fretting? 	should I have fretted?
should you have fretted?
should he have fretted?
should we have fretted?
should you have fretted?
should they have fretted? 	should I have been fretting?
should you have been fretting?
should he have been fretting?
should we have been fretting?
should you have been fretting?
should they have been fretting? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
should I not fret?
should you not fret?
should he not fret?
should we not fret?
should you not fret?
should they not fret? 	should I not be fretting?
should you not be fretting?
should he not be fretting?
should we not be fretting?
should you not be fretting?
should they not be fretting? 	should I not have fretted?
should you not have fretted?
should he not have fretted?
should we not have fretted?
should you not have fretted?
should they not have fretted? 	should I not have been fretting?
should you not have been fretting?
should he not have been fretting?
should we not have been fretting?
should you not have been fretting?
should they not have been fretting?