English verb conjugation
COULD LIQUEFY

Regular verb: liquefy - liquefied - liquefied

Affirmation

Simple form	V-ing form
I could liquefy you could liquefy he could liquefy we could liquefy you could liquefy they could liquefy	I could be liquefying you could be liquefying he could be liquefying we could be liquefying you could be liquefying they could be liquefying
Perfect	V-ing perfect
I could have liquefied you could have liquefied he could have liquefied we could have liquefied you could have liquefied they could have liquefied	I could have been liquefying you could have been liquefying he could have been liquefying we could have been liquefying you could have been liquefying they could have been liquefying

Negation

Simple form	V-ing form
I couldn't liquefy you couldn't liquefy he couldn't liquefy we couldn't liquefy you couldn't liquefy they couldn't liquefy	I couldn't be liquefying you couldn't be liquefying he couldn't be liquefying we couldn't be liquefying you couldn't be liquefying they couldn't be liquefying
Perfect	V-ing perfect
I couldn't have liquefied you couldn't have liquefied he couldn't have liquefied we couldn't have liquefied you couldn't have liquefied they couldn't have liquefied	I couldn't have been liquefying you couldn't have been liquefying he couldn't have been liquefying we couldn't have been liquefying you couldn't have been liquefying they couldn't have been liquefying

Interrogative form

Simple form	V-ing form
could I liquefy? could you liquefy? could he liquefy? could we liquefy? could you liquefy? could they liquefy?	could I be liquefying? could you be liquefying? could he be liquefying? could we be liquefying? could you be liquefying? could they be liquefying?
Perfect	V-ing perfect
could I have liquefied? could you have liquefied? could he have liquefied? could we have liquefied? could you have liquefied? could they have liquefied?	could I have been liquefying? could you have been liquefying? could he have been liquefying? could we have been liquefying? could you have been liquefying? could they have been liquefying?

Interro-negative form

Simple form	V-ing form
couldn't I liquefy? couldn't you liquefy? couldn't he liquefy? couldn't we liquefy? couldn't you liquefy? couldn't they liquefy?	couldn't I be liquefying? couldn't you be liquefying? couldn't he be liquefying? couldn't we be liquefying? couldn't you be liquefying? couldn't they be liquefying?
Perfect	V-ing perfect
couldn't I have liquefied? couldn't you have liquefied? couldn't he have liquefied? couldn't we have liquefied? couldn't you have liquefied? couldn't they have liquefied?	couldn't I have been liquefying? couldn't you have been liquefying? couldn't he have been liquefying? couldn't we have been liquefying? couldn't you have been liquefying? couldn't they have been liquefying?