I ought to liquefy you ought to liquefy she ought to liquefy we ought to liquefy you ought to liquefy they ought to liquefy
V-ing form
I ought to be liquefying you ought to be liquefying she ought to be liquefying we ought to be liquefying you ought to be liquefying they ought to be liquefying
Perfect
I ought to have liquefied you ought to have liquefied she ought to have liquefied we ought to have liquefied you ought to have liquefied they ought to have liquefied
V-ing perfect
I ought to have been liquefying you ought to have been liquefying she ought to have been liquefying we ought to have been liquefying you ought to have been liquefying they ought to have been liquefying
Negation
Simple form
I oughtn't to liquefy you oughtn't to liquefy she oughtn't to liquefy we oughtn't to liquefy you oughtn't to liquefy they oughtn't to liquefy
V-ing form
I oughtn't to be liquefying you oughtn't to be liquefying she oughtn't to be liquefying we oughtn't to be liquefying you oughtn't to be liquefying they oughtn't to be liquefying
Perfect
I oughtn't to have liquefied you oughtn't to have liquefied she oughtn't to have liquefied we oughtn't to have liquefied you oughtn't to have liquefied they oughtn't to have liquefied
V-ing perfect
I oughtn't to have been liquefying you oughtn't to have been liquefying she oughtn't to have been liquefying we oughtn't to have been liquefying you oughtn't to have been liquefying they oughtn't to have been liquefying
Interrogative form
Simple form
ought to I liquefy? ought to you liquefy? ought to she liquefy? ought to we liquefy? ought to you liquefy? ought to they liquefy?
V-ing form
ought to I be liquefying? ought to you be liquefying? ought to she be liquefying? ought to we be liquefying? ought to you be liquefying? ought to they be liquefying?
Perfect
ought to I have liquefied? ought to you have liquefied? ought to she have liquefied? ought to we have liquefied? ought to you have liquefied? ought to they have liquefied?
V-ing perfect
ought to I have been liquefying? ought to you have been liquefying? ought to she have been liquefying? ought to we have been liquefying? ought to you have been liquefying? ought to they have been liquefying?
Interro-negative form
Simple form
oughtn't I to liquefy? oughtn't you to liquefy? oughtn't she to liquefy? oughtn't we to liquefy? oughtn't you to liquefy? oughtn't they to liquefy?
V-ing form
oughtn't I to be liquefying? oughtn't you to be liquefying? oughtn't she to be liquefying? oughtn't we to be liquefying? oughtn't you to be liquefying? oughtn't they to be liquefying?
Perfect
oughtn't I to have liquefied? oughtn't you to have liquefied? oughtn't she to have liquefied? oughtn't we to have liquefied? oughtn't you to have liquefied? oughtn't they to have liquefied?
V-ing perfect
oughtn't I to have been liquefying? oughtn't you to have been liquefying? oughtn't she to have been liquefying? oughtn't we to have been liquefying? oughtn't you to have been liquefying? oughtn't they to have been liquefying?