ought to tunnel
Regular verb: tunnel - tunnelled- tunnelled

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I ought to tunnel
you ought to tunnel
he ought to tunnel
we ought to tunnel
you ought to tunnel
they ought to tunnel 	I ought to be tunnelling
you ought to be tunnelling
he ought to be tunnelling
we ought to be tunnelling
you ought to be tunnelling
they ought to be tunnelling	I ought to have tunnelled
you ought to have tunnelled
he ought to have tunnelled
we ought to have tunnelled
you ought to have tunnelled
they ought to have tunnelled	I ought to have been tunnelling
you ought to have been tunnelling
he ought to have been tunnelling
we ought to have been tunnelling
you ought to have been tunnelling
they ought to have been tunnelling	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I oughtn't to tunnel
you oughtn't to tunnel
he oughtn't to tunnel
we oughtn't to tunnel
you oughtn't to tunnel
they oughtn't to tunnel 	I oughtn't to be tunnelling
you oughtn't to be tunnelling
he oughtn't to be tunnelling
we oughtn't to be tunnelling
you oughtn't to be tunnelling
they oughtn't to be tunnelling	I oughtn't to have tunnelled
you oughtn't to have tunnelled
he oughtn't to have tunnelled
we oughtn't to have tunnelled
you oughtn't to have tunnelled
they oughtn't to have tunnelled	I oughtn't to have been tunnelling
you oughtn't to have been tunnelling
he oughtn't to have been tunnelling
we oughtn't to have been tunnelling
you oughtn't to have been tunnelling
they oughtn't to have been tunnelling	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
ought to I tunnel?
ought to you tunnel?
ought to he tunnel?
ought to we tunnel?
ought to you tunnel?
ought to they tunnel? 	ought to I be tunnelling?
ought to you be tunnelling?
ought to he be tunnelling?
ought to we be tunnelling?
ought to you be tunnelling?
ought to they be tunnelling? 	ought to I have tunnelled?
ought to you have tunnelled?
ought to he have tunnelled?
ought to we have tunnelled?
ought to you have tunnelled?
ought to they have tunnelled? 	ought to I have been tunnelling?
ought to you have been tunnelling?
ought to he have been tunnelling?
ought to we have been tunnelling?
ought to you have been tunnelling?
ought to they have been tunnelling? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
oughtn't I to tunnel?
oughtn't you to tunnel?
oughtn't he to tunnel?
oughtn't we to tunnel?
oughtn't you to tunnel?
oughtn't they to tunnel? 	oughtn't I to be tunnelling?
oughtn't you to be tunnelling?
oughtn't he to be tunnelling?
oughtn't we to be tunnelling?
oughtn't you to be tunnelling?
oughtn't they to be tunnelling? 	oughtn't I to have tunnelled?
oughtn't you to have tunnelled?
oughtn't he to have tunnelled?
oughtn't we to have tunnelled?
oughtn't you to have tunnelled?
oughtn't they to have tunnelled? 	oughtn't I to have been tunnelling?
oughtn't you to have been tunnelling?
oughtn't he to have been tunnelling?
oughtn't we to have been tunnelling?
oughtn't you to have been tunnelling?
oughtn't they to have been tunnelling?