ought to grub
Regular verb: grub - grubbed- grubbed

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I ought to grub
you ought to grub
she ought to grub
we ought to grub
you ought to grub
they ought to grub 	I ought to be grubbing
you ought to be grubbing
she ought to be grubbing
we ought to be grubbing
you ought to be grubbing
they ought to be grubbing	I ought to have grubbed
you ought to have grubbed
she ought to have grubbed
we ought to have grubbed
you ought to have grubbed
they ought to have grubbed	I ought to have been grubbing
you ought to have been grubbing
she ought to have been grubbing
we ought to have been grubbing
you ought to have been grubbing
they ought to have been grubbing	

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

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

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