ought to sip
Regular verb: sip - sipped- sipped

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I ought to sip
you ought to sip
she ought to sip
we ought to sip
you ought to sip
they ought to sip 	I ought to be sipping
you ought to be sipping
she ought to be sipping
we ought to be sipping
you ought to be sipping
they ought to be sipping	I ought to have sipped
you ought to have sipped
she ought to have sipped
we ought to have sipped
you ought to have sipped
they ought to have sipped	I ought to have been sipping
you ought to have been sipping
she ought to have been sipping
we ought to have been sipping
you ought to have been sipping
they ought to have been sipping	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I oughtn't to sip
you oughtn't to sip
she oughtn't to sip
we oughtn't to sip
you oughtn't to sip
they oughtn't to sip 	I oughtn't to be sipping
you oughtn't to be sipping
she oughtn't to be sipping
we oughtn't to be sipping
you oughtn't to be sipping
they oughtn't to be sipping	I oughtn't to have sipped
you oughtn't to have sipped
she oughtn't to have sipped
we oughtn't to have sipped
you oughtn't to have sipped
they oughtn't to have sipped	I oughtn't to have been sipping
you oughtn't to have been sipping
she oughtn't to have been sipping
we oughtn't to have been sipping
you oughtn't to have been sipping
they oughtn't to have been sipping	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
ought to I sip?
ought to you sip?
ought to she sip?
ought to we sip?
ought to you sip?
ought to they sip? 	ought to I be sipping?
ought to you be sipping?
ought to she be sipping?
ought to we be sipping?
ought to you be sipping?
ought to they be sipping? 	ought to I have sipped?
ought to you have sipped?
ought to she have sipped?
ought to we have sipped?
ought to you have sipped?
ought to they have sipped? 	ought to I have been sipping?
ought to you have been sipping?
ought to she have been sipping?
ought to we have been sipping?
ought to you have been sipping?
ought to they have been sipping? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
oughtn't I to sip?
oughtn't you to sip?
oughtn't she to sip?
oughtn't we to sip?
oughtn't you to sip?
oughtn't they to sip? 	oughtn't I to be sipping?
oughtn't you to be sipping?
oughtn't she to be sipping?
oughtn't we to be sipping?
oughtn't you to be sipping?
oughtn't they to be sipping? 	oughtn't I to have sipped?
oughtn't you to have sipped?
oughtn't she to have sipped?
oughtn't we to have sipped?
oughtn't you to have sipped?
oughtn't they to have sipped? 	oughtn't I to have been sipping?
oughtn't you to have been sipping?
oughtn't she to have been sipping?
oughtn't we to have been sipping?
oughtn't you to have been sipping?
oughtn't they to have been sipping?