ought to excavate
Regular verb: excavate - excavated- excavated

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I ought to excavate
you ought to excavate
he ought to excavate
we ought to excavate
you ought to excavate
they ought to excavate 	I ought to be excavating
you ought to be excavating
he ought to be excavating
we ought to be excavating
you ought to be excavating
they ought to be excavating	I ought to have excavated
you ought to have excavated
he ought to have excavated
we ought to have excavated
you ought to have excavated
they ought to have excavated	I ought to have been excavating
you ought to have been excavating
he ought to have been excavating
we ought to have been excavating
you ought to have been excavating
they ought to have been excavating	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I oughtn't to excavate
you oughtn't to excavate
he oughtn't to excavate
we oughtn't to excavate
you oughtn't to excavate
they oughtn't to excavate 	I oughtn't to be excavating
you oughtn't to be excavating
he oughtn't to be excavating
we oughtn't to be excavating
you oughtn't to be excavating
they oughtn't to be excavating	I oughtn't to have excavated
you oughtn't to have excavated
he oughtn't to have excavated
we oughtn't to have excavated
you oughtn't to have excavated
they oughtn't to have excavated	I oughtn't to have been excavating
you oughtn't to have been excavating
he oughtn't to have been excavating
we oughtn't to have been excavating
you oughtn't to have been excavating
they oughtn't to have been excavating	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
ought to I excavate?
ought to you excavate?
ought to he excavate?
ought to we excavate?
ought to you excavate?
ought to they excavate? 	ought to I be excavating?
ought to you be excavating?
ought to he be excavating?
ought to we be excavating?
ought to you be excavating?
ought to they be excavating? 	ought to I have excavated?
ought to you have excavated?
ought to he have excavated?
ought to we have excavated?
ought to you have excavated?
ought to they have excavated? 	ought to I have been excavating?
ought to you have been excavating?
ought to he have been excavating?
ought to we have been excavating?
ought to you have been excavating?
ought to they have been excavating? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
oughtn't I to excavate?
oughtn't you to excavate?
oughtn't he to excavate?
oughtn't we to excavate?
oughtn't you to excavate?
oughtn't they to excavate? 	oughtn't I to be excavating?
oughtn't you to be excavating?
oughtn't he to be excavating?
oughtn't we to be excavating?
oughtn't you to be excavating?
oughtn't they to be excavating? 	oughtn't I to have excavated?
oughtn't you to have excavated?
oughtn't he to have excavated?
oughtn't we to have excavated?
oughtn't you to have excavated?
oughtn't they to have excavated? 	oughtn't I to have been excavating?
oughtn't you to have been excavating?
oughtn't he to have been excavating?
oughtn't we to have been excavating?
oughtn't you to have been excavating?
oughtn't they to have been excavating?