should zip
Regular verb: zip - zipped- zipped

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I'd zip
you'd zip
she'd zip
we'd zip
you'd zip
they'd zip 	I'd be zipping
you'd be zipping
she'd be zipping
we'd be zipping
you'd be zipping
they'd be zipping	I should've zipped
you should've zipped
she should've zipped
we should've zipped
you should've zipped
they should've zipped	I should've been zipping
you should've been zipping
she should've been zipping
we should've been zipping
you should've been zipping
they should've been zipping	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I shouldn't zip
you shouldn't zip
she shouldn't zip
we shouldn't zip
you shouldn't zip
they shouldn't zip 	I shouldn't be zipping
you shouldn't be zipping
she shouldn't be zipping
we shouldn't be zipping
you shouldn't be zipping
they shouldn't be zipping	I shouldn't have zipped
you shouldn't have zipped
she shouldn't have zipped
we shouldn't have zipped
you shouldn't have zipped
they shouldn't have zipped	I shouldn't have been zipping
you shouldn't have been zipping
she shouldn't have been zipping
we shouldn't have been zipping
you shouldn't have been zipping
they shouldn't have been zipping	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
should I zip?
should you zip?
should she zip?
should we zip?
should you zip?
should they zip? 	should I be zipping?
should you be zipping?
should she be zipping?
should we be zipping?
should you be zipping?
should they be zipping? 	should I have zipped?
should you have zipped?
should she have zipped?
should we have zipped?
should you have zipped?
should they have zipped? 	should I have been zipping?
should you have been zipping?
should she have been zipping?
should we have been zipping?
should you have been zipping?
should they have been zipping? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
shouldn't I zip?
shouldn't you zip?
shouldn't she zip?
shouldn't we zip?
shouldn't you zip?
shouldn't they zip? 	shouldn't I be zipping?
shouldn't you be zipping?
shouldn't she be zipping?
shouldn't we be zipping?
shouldn't you be zipping?
shouldn't they be zipping? 	shouldn't I have zipped?
shouldn't you have zipped?
shouldn't she have zipped?
shouldn't we have zipped?
shouldn't you have zipped?
shouldn't they have zipped? 	shouldn't I have been zipping?
shouldn't you have been zipping?
shouldn't she have been zipping?
shouldn't we have been zipping?
shouldn't you have been zipping?
shouldn't they have been zipping?