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