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
she 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
she 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
she 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
she 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 ought not to assist
you ought not to assist
she ought not to assist
we ought not to assist
you ought not to assist
they ought not to assist 	I ought not to assisting
you ought not to assisting
she ought not to assisting
we ought not to assisting
you ought not to assisting
they ought not to assisting	I ought not to have assisted
you ought not to have assisted
she ought not to have assisted
we ought not to have assisted
you ought not to have assisted
they ought not to have assisted	I ought not to have been assisting
you ought not to have been assisting
she ought not to have been assisting
we ought not to have been assisting
you ought not to have been assisting
they ought not 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 she 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 she 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 she 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 she 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 	
ought I not to assist?
ought you not to assist?
ought she not to assist?
ought we not to assist?
ought you not to assist?
ought they not to assist? 	ought I not to be assisting?
ought you not to be assisting?
ought she not to be assisting?
ought we not to be assisting?
ought you not to be assisting?
ought they not to be assisting? 	ought I not to have assisted?
ought you not to have assisted?
ought she not to have assisted?
ought we not to have assisted?
ought you not to have assisted?
ought they not to have assisted? 	ought I not to have been assisting?
ought you not to have been assisting?
ought she not to have been assisting?
ought we not to have been assisting?
ought you not to have been assisting?
ought they not to have been assisting?