should buck
Regular verb: buck - bucked- bucked

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I'd buck
you'd buck
she'd buck
we'd buck
you'd buck
they'd buck 	I'd be bucking
you'd be bucking
she'd be bucking
we'd be bucking
you'd be bucking
they'd be bucking	I should've bucked
you should've bucked
she should've bucked
we should've bucked
you should've bucked
they should've bucked	I should've been bucking
you should've been bucking
she should've been bucking
we should've been bucking
you should've been bucking
they should've been bucking	

Negation 	
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I shouldn't buck
you shouldn't buck
she shouldn't buck
we shouldn't buck
you shouldn't buck
they shouldn't buck 	I shouldn't be bucking
you shouldn't be bucking
she shouldn't be bucking
we shouldn't be bucking
you shouldn't be bucking
they shouldn't be bucking	I shouldn't have bucked
you shouldn't have bucked
she shouldn't have bucked
we shouldn't have bucked
you shouldn't have bucked
they shouldn't have bucked	I shouldn't have been bucking
you shouldn't have been bucking
she shouldn't have been bucking
we shouldn't have been bucking
you shouldn't have been bucking
they shouldn't have been bucking	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
should I buck?
should you buck?
should she buck?
should we buck?
should you buck?
should they buck? 	should I be bucking?
should you be bucking?
should she be bucking?
should we be bucking?
should you be bucking?
should they be bucking? 	should I have bucked?
should you have bucked?
should she have bucked?
should we have bucked?
should you have bucked?
should they have bucked? 	should I have been bucking?
should you have been bucking?
should she have been bucking?
should we have been bucking?
should you have been bucking?
should they have been bucking? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
shouldn't I buck?
shouldn't you buck?
shouldn't she buck?
shouldn't we buck?
shouldn't you buck?
shouldn't they buck? 	shouldn't I be bucking?
shouldn't you be bucking?
shouldn't she be bucking?
shouldn't we be bucking?
shouldn't you be bucking?
shouldn't they be bucking? 	shouldn't I have bucked?
shouldn't you have bucked?
shouldn't she have bucked?
shouldn't we have bucked?
shouldn't you have bucked?
shouldn't they have bucked? 	shouldn't I have been bucking?
shouldn't you have been bucking?
shouldn't she have been bucking?
shouldn't we have been bucking?
shouldn't you have been bucking?
shouldn't they have been bucking?