ought to suffocate
Regular verb: suffocate - suffocated- suffocated

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I ought to suffocate
you ought to suffocate
she ought to suffocate
we ought to suffocate
you ought to suffocate
they ought to suffocate 	I ought to be suffocating
you ought to be suffocating
she ought to be suffocating
we ought to be suffocating
you ought to be suffocating
they ought to be suffocating	I ought to have suffocated
you ought to have suffocated
she ought to have suffocated
we ought to have suffocated
you ought to have suffocated
they ought to have suffocated	I ought to have been suffocating
you ought to have been suffocating
she ought to have been suffocating
we ought to have been suffocating
you ought to have been suffocating
they ought to have been suffocating	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I oughtn't to suffocate
you oughtn't to suffocate
she oughtn't to suffocate
we oughtn't to suffocate
you oughtn't to suffocate
they oughtn't to suffocate 	I oughtn't to be suffocating
you oughtn't to be suffocating
she oughtn't to be suffocating
we oughtn't to be suffocating
you oughtn't to be suffocating
they oughtn't to be suffocating	I oughtn't to have suffocated
you oughtn't to have suffocated
she oughtn't to have suffocated
we oughtn't to have suffocated
you oughtn't to have suffocated
they oughtn't to have suffocated	I oughtn't to have been suffocating
you oughtn't to have been suffocating
she oughtn't to have been suffocating
we oughtn't to have been suffocating
you oughtn't to have been suffocating
they oughtn't to have been suffocating	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
ought to I suffocate?
ought to you suffocate?
ought to she suffocate?
ought to we suffocate?
ought to you suffocate?
ought to they suffocate? 	ought to I be suffocating?
ought to you be suffocating?
ought to she be suffocating?
ought to we be suffocating?
ought to you be suffocating?
ought to they be suffocating? 	ought to I have suffocated?
ought to you have suffocated?
ought to she have suffocated?
ought to we have suffocated?
ought to you have suffocated?
ought to they have suffocated? 	ought to I have been suffocating?
ought to you have been suffocating?
ought to she have been suffocating?
ought to we have been suffocating?
ought to you have been suffocating?
ought to they have been suffocating? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
oughtn't I to suffocate?
oughtn't you to suffocate?
oughtn't she to suffocate?
oughtn't we to suffocate?
oughtn't you to suffocate?
oughtn't they to suffocate? 	oughtn't I to be suffocating?
oughtn't you to be suffocating?
oughtn't she to be suffocating?
oughtn't we to be suffocating?
oughtn't you to be suffocating?
oughtn't they to be suffocating? 	oughtn't I to have suffocated?
oughtn't you to have suffocated?
oughtn't she to have suffocated?
oughtn't we to have suffocated?
oughtn't you to have suffocated?
oughtn't they to have suffocated? 	oughtn't I to have been suffocating?
oughtn't you to have been suffocating?
oughtn't she to have been suffocating?
oughtn't we to have been suffocating?
oughtn't you to have been suffocating?
oughtn't they to have been suffocating?