ought to prop
Regular verb: prop - propped- propped

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I ought to prop
you ought to prop
he ought to prop
we ought to prop
you ought to prop
they ought to prop 	I ought to be propping
you ought to be propping
he ought to be propping
we ought to be propping
you ought to be propping
they ought to be propping	I ought to have propped
you ought to have propped
he ought to have propped
we ought to have propped
you ought to have propped
they ought to have propped	I ought to have been propping
you ought to have been propping
he ought to have been propping
we ought to have been propping
you ought to have been propping
they ought to have been propping	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I ought not to prop
you ought not to prop
he ought not to prop
we ought not to prop
you ought not to prop
they ought not to prop 	I ought not to propping
you ought not to propping
he ought not to propping
we ought not to propping
you ought not to propping
they ought not to propping	I ought not to have propped
you ought not to have propped
he ought not to have propped
we ought not to have propped
you ought not to have propped
they ought not to have propped	I ought not to have been propping
you ought not to have been propping
he ought not to have been propping
we ought not to have been propping
you ought not to have been propping
they ought not to have been propping	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
ought to I prop?
ought to you prop?
ought to he prop?
ought to we prop?
ought to you prop?
ought to they prop? 	ought to I be propping?
ought to you be propping?
ought to he be propping?
ought to we be propping?
ought to you be propping?
ought to they be propping? 	ought to I have propped?
ought to you have propped?
ought to he have propped?
ought to we have propped?
ought to you have propped?
ought to they have propped? 	ought to I have been propping?
ought to you have been propping?
ought to he have been propping?
ought to we have been propping?
ought to you have been propping?
ought to they have been propping? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
ought I not to prop?
ought you not to prop?
ought he not to prop?
ought we not to prop?
ought you not to prop?
ought they not to prop? 	ought I not to be propping?
ought you not to be propping?
ought he not to be propping?
ought we not to be propping?
ought you not to be propping?
ought they not to be propping? 	ought I not to have propped?
ought you not to have propped?
ought he not to have propped?
ought we not to have propped?
ought you not to have propped?
ought they not to have propped? 	ought I not to have been propping?
ought you not to have been propping?
ought he not to have been propping?
ought we not to have been propping?
ought you not to have been propping?
ought they not to have been propping?