ought to perfuse
Regular verb: perfuse - perfused- perfused

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I ought to perfuse
you ought to perfuse
he ought to perfuse
we ought to perfuse
you ought to perfuse
they ought to perfuse 	I ought to be perfusing
you ought to be perfusing
he ought to be perfusing
we ought to be perfusing
you ought to be perfusing
they ought to be perfusing	I ought to have perfused
you ought to have perfused
he ought to have perfused
we ought to have perfused
you ought to have perfused
they ought to have perfused	I ought to have been perfusing
you ought to have been perfusing
he ought to have been perfusing
we ought to have been perfusing
you ought to have been perfusing
they ought to have been perfusing	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I oughtn't to perfuse
you oughtn't to perfuse
he oughtn't to perfuse
we oughtn't to perfuse
you oughtn't to perfuse
they oughtn't to perfuse 	I oughtn't to be perfusing
you oughtn't to be perfusing
he oughtn't to be perfusing
we oughtn't to be perfusing
you oughtn't to be perfusing
they oughtn't to be perfusing	I oughtn't to have perfused
you oughtn't to have perfused
he oughtn't to have perfused
we oughtn't to have perfused
you oughtn't to have perfused
they oughtn't to have perfused	I oughtn't to have been perfusing
you oughtn't to have been perfusing
he oughtn't to have been perfusing
we oughtn't to have been perfusing
you oughtn't to have been perfusing
they oughtn't to have been perfusing	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
ought to I perfuse?
ought to you perfuse?
ought to he perfuse?
ought to we perfuse?
ought to you perfuse?
ought to they perfuse? 	ought to I be perfusing?
ought to you be perfusing?
ought to he be perfusing?
ought to we be perfusing?
ought to you be perfusing?
ought to they be perfusing? 	ought to I have perfused?
ought to you have perfused?
ought to he have perfused?
ought to we have perfused?
ought to you have perfused?
ought to they have perfused? 	ought to I have been perfusing?
ought to you have been perfusing?
ought to he have been perfusing?
ought to we have been perfusing?
ought to you have been perfusing?
ought to they have been perfusing? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
oughtn't I to perfuse?
oughtn't you to perfuse?
oughtn't he to perfuse?
oughtn't we to perfuse?
oughtn't you to perfuse?
oughtn't they to perfuse? 	oughtn't I to be perfusing?
oughtn't you to be perfusing?
oughtn't he to be perfusing?
oughtn't we to be perfusing?
oughtn't you to be perfusing?
oughtn't they to be perfusing? 	oughtn't I to have perfused?
oughtn't you to have perfused?
oughtn't he to have perfused?
oughtn't we to have perfused?
oughtn't you to have perfused?
oughtn't they to have perfused? 	oughtn't I to have been perfusing?
oughtn't you to have been perfusing?
oughtn't he to have been perfusing?
oughtn't we to have been perfusing?
oughtn't you to have been perfusing?
oughtn't they to have been perfusing?