ought to thicken
Regular verb: thicken - thickened- thickened

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I ought to thicken
you ought to thicken
he ought to thicken
we ought to thicken
you ought to thicken
they ought to thicken 	I ought to be thickening
you ought to be thickening
he ought to be thickening
we ought to be thickening
you ought to be thickening
they ought to be thickening	I ought to have thickened
you ought to have thickened
he ought to have thickened
we ought to have thickened
you ought to have thickened
they ought to have thickened	I ought to have been thickening
you ought to have been thickening
he ought to have been thickening
we ought to have been thickening
you ought to have been thickening
they ought to have been thickening	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I oughtn't to thicken
you oughtn't to thicken
he oughtn't to thicken
we oughtn't to thicken
you oughtn't to thicken
they oughtn't to thicken 	I oughtn't to be thickening
you oughtn't to be thickening
he oughtn't to be thickening
we oughtn't to be thickening
you oughtn't to be thickening
they oughtn't to be thickening	I oughtn't to have thickened
you oughtn't to have thickened
he oughtn't to have thickened
we oughtn't to have thickened
you oughtn't to have thickened
they oughtn't to have thickened	I oughtn't to have been thickening
you oughtn't to have been thickening
he oughtn't to have been thickening
we oughtn't to have been thickening
you oughtn't to have been thickening
they oughtn't to have been thickening	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
ought to I thicken?
ought to you thicken?
ought to he thicken?
ought to we thicken?
ought to you thicken?
ought to they thicken? 	ought to I be thickening?
ought to you be thickening?
ought to he be thickening?
ought to we be thickening?
ought to you be thickening?
ought to they be thickening? 	ought to I have thickened?
ought to you have thickened?
ought to he have thickened?
ought to we have thickened?
ought to you have thickened?
ought to they have thickened? 	ought to I have been thickening?
ought to you have been thickening?
ought to he have been thickening?
ought to we have been thickening?
ought to you have been thickening?
ought to they have been thickening? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
oughtn't I to thicken?
oughtn't you to thicken?
oughtn't he to thicken?
oughtn't we to thicken?
oughtn't you to thicken?
oughtn't they to thicken? 	oughtn't I to be thickening?
oughtn't you to be thickening?
oughtn't he to be thickening?
oughtn't we to be thickening?
oughtn't you to be thickening?
oughtn't they to be thickening? 	oughtn't I to have thickened?
oughtn't you to have thickened?
oughtn't he to have thickened?
oughtn't we to have thickened?
oughtn't you to have thickened?
oughtn't they to have thickened? 	oughtn't I to have been thickening?
oughtn't you to have been thickening?
oughtn't he to have been thickening?
oughtn't we to have been thickening?
oughtn't you to have been thickening?
oughtn't they to have been thickening?