ought to trephine
Regular verb: trephine - trephined- trephined

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I ought to trephine
you ought to trephine
he ought to trephine
we ought to trephine
you ought to trephine
they ought to trephine 	I ought to be trephining
you ought to be trephining
he ought to be trephining
we ought to be trephining
you ought to be trephining
they ought to be trephining	I ought to have trephined
you ought to have trephined
he ought to have trephined
we ought to have trephined
you ought to have trephined
they ought to have trephined	I ought to have been trephining
you ought to have been trephining
he ought to have been trephining
we ought to have been trephining
you ought to have been trephining
they ought to have been trephining	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I ought not to trephine
you ought not to trephine
he ought not to trephine
we ought not to trephine
you ought not to trephine
they ought not to trephine 	I ought not to trephining
you ought not to trephining
he ought not to trephining
we ought not to trephining
you ought not to trephining
they ought not to trephining	I ought not to have trephined
you ought not to have trephined
he ought not to have trephined
we ought not to have trephined
you ought not to have trephined
they ought not to have trephined	I ought not to have been trephining
you ought not to have been trephining
he ought not to have been trephining
we ought not to have been trephining
you ought not to have been trephining
they ought not to have been trephining	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
ought to I trephine?
ought to you trephine?
ought to he trephine?
ought to we trephine?
ought to you trephine?
ought to they trephine? 	ought to I be trephining?
ought to you be trephining?
ought to he be trephining?
ought to we be trephining?
ought to you be trephining?
ought to they be trephining? 	ought to I have trephined?
ought to you have trephined?
ought to he have trephined?
ought to we have trephined?
ought to you have trephined?
ought to they have trephined? 	ought to I have been trephining?
ought to you have been trephining?
ought to he have been trephining?
ought to we have been trephining?
ought to you have been trephining?
ought to they have been trephining? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
ought I not to trephine?
ought you not to trephine?
ought he not to trephine?
ought we not to trephine?
ought you not to trephine?
ought they not to trephine? 	ought I not to be trephining?
ought you not to be trephining?
ought he not to be trephining?
ought we not to be trephining?
ought you not to be trephining?
ought they not to be trephining? 	ought I not to have trephined?
ought you not to have trephined?
ought he not to have trephined?
ought we not to have trephined?
ought you not to have trephined?
ought they not to have trephined? 	ought I not to have been trephining?
ought you not to have been trephining?
ought he not to have been trephining?
ought we not to have been trephining?
ought you not to have been trephining?
ought they not to have been trephining?