should grub
Regular verb: grub - grubbed- grubbed

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I'd grub
you'd grub
she'd grub
we'd grub
you'd grub
they'd grub 	I'd be grubbing
you'd be grubbing
she'd be grubbing
we'd be grubbing
you'd be grubbing
they'd be grubbing	I should've grubbed
you should've grubbed
she should've grubbed
we should've grubbed
you should've grubbed
they should've grubbed	I should've been grubbing
you should've been grubbing
she should've been grubbing
we should've been grubbing
you should've been grubbing
they should've been grubbing	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I shouldn't grub
you shouldn't grub
she shouldn't grub
we shouldn't grub
you shouldn't grub
they shouldn't grub 	I shouldn't be grubbing
you shouldn't be grubbing
she shouldn't be grubbing
we shouldn't be grubbing
you shouldn't be grubbing
they shouldn't be grubbing	I shouldn't have grubbed
you shouldn't have grubbed
she shouldn't have grubbed
we shouldn't have grubbed
you shouldn't have grubbed
they shouldn't have grubbed	I shouldn't have been grubbing
you shouldn't have been grubbing
she shouldn't have been grubbing
we shouldn't have been grubbing
you shouldn't have been grubbing
they shouldn't have been grubbing	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
should I grub?
should you grub?
should she grub?
should we grub?
should you grub?
should they grub? 	should I be grubbing?
should you be grubbing?
should she be grubbing?
should we be grubbing?
should you be grubbing?
should they be grubbing? 	should I have grubbed?
should you have grubbed?
should she have grubbed?
should we have grubbed?
should you have grubbed?
should they have grubbed? 	should I have been grubbing?
should you have been grubbing?
should she have been grubbing?
should we have been grubbing?
should you have been grubbing?
should they have been grubbing? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
shouldn't I grub?
shouldn't you grub?
shouldn't she grub?
shouldn't we grub?
shouldn't you grub?
shouldn't they grub? 	shouldn't I be grubbing?
shouldn't you be grubbing?
shouldn't she be grubbing?
shouldn't we be grubbing?
shouldn't you be grubbing?
shouldn't they be grubbing? 	shouldn't I have grubbed?
shouldn't you have grubbed?
shouldn't she have grubbed?
shouldn't we have grubbed?
shouldn't you have grubbed?
shouldn't they have grubbed? 	shouldn't I have been grubbing?
shouldn't you have been grubbing?
shouldn't she have been grubbing?
shouldn't we have been grubbing?
shouldn't you have been grubbing?
shouldn't they have been grubbing?