ought to assist
Regular verb: assist - assisted- assisted

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I ought to assist
you ought to assist
he ought to assist
we ought to assist
you ought to assist
they ought to assist 	I ought to be assisting
you ought to be assisting
he ought to be assisting
we ought to be assisting
you ought to be assisting
they ought to be assisting	I ought to have assisted
you ought to have assisted
he ought to have assisted
we ought to have assisted
you ought to have assisted
they ought to have assisted	I ought to have been assisting
you ought to have been assisting
he ought to have been assisting
we ought to have been assisting
you ought to have been assisting
they ought to have been assisting	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I oughtn't to assist
you oughtn't to assist
he oughtn't to assist
we oughtn't to assist
you oughtn't to assist
they oughtn't to assist 	I oughtn't to be assisting
you oughtn't to be assisting
he oughtn't to be assisting
we oughtn't to be assisting
you oughtn't to be assisting
they oughtn't to be assisting	I oughtn't to have assisted
you oughtn't to have assisted
he oughtn't to have assisted
we oughtn't to have assisted
you oughtn't to have assisted
they oughtn't to have assisted	I oughtn't to have been assisting
you oughtn't to have been assisting
he oughtn't to have been assisting
we oughtn't to have been assisting
you oughtn't to have been assisting
they oughtn't to have been assisting	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
ought to I assist?
ought to you assist?
ought to he assist?
ought to we assist?
ought to you assist?
ought to they assist? 	ought to I be assisting?
ought to you be assisting?
ought to he be assisting?
ought to we be assisting?
ought to you be assisting?
ought to they be assisting? 	ought to I have assisted?
ought to you have assisted?
ought to he have assisted?
ought to we have assisted?
ought to you have assisted?
ought to they have assisted? 	ought to I have been assisting?
ought to you have been assisting?
ought to he have been assisting?
ought to we have been assisting?
ought to you have been assisting?
ought to they have been assisting? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
oughtn't I to assist?
oughtn't you to assist?
oughtn't he to assist?
oughtn't we to assist?
oughtn't you to assist?
oughtn't they to assist? 	oughtn't I to be assisting?
oughtn't you to be assisting?
oughtn't he to be assisting?
oughtn't we to be assisting?
oughtn't you to be assisting?
oughtn't they to be assisting? 	oughtn't I to have assisted?
oughtn't you to have assisted?
oughtn't he to have assisted?
oughtn't we to have assisted?
oughtn't you to have assisted?
oughtn't they to have assisted? 	oughtn't I to have been assisting?
oughtn't you to have been assisting?
oughtn't he to have been assisting?
oughtn't we to have been assisting?
oughtn't you to have been assisting?
oughtn't they to have been assisting?