English verb conjugation
COULD REPURIFY

Regular verb: repurify - repurified - repurified

Affirmation

Simple form	V-ing form
I could repurify you could repurify she could repurify we could repurify you could repurify they could repurify	I could be repurifying you could be repurifying she could be repurifying we could be repurifying you could be repurifying they could be repurifying
Perfect	V-ing perfect
I could have repurified you could have repurified she could have repurified we could have repurified you could have repurified they could have repurified	I could have been repurifying you could have been repurifying she could have been repurifying we could have been repurifying you could have been repurifying they could have been repurifying

Negation

Simple form	V-ing form
I couldn't repurify you couldn't repurify she couldn't repurify we couldn't repurify you couldn't repurify they couldn't repurify	I couldn't be repurifying you couldn't be repurifying she couldn't be repurifying we couldn't be repurifying you couldn't be repurifying they couldn't be repurifying
Perfect	V-ing perfect
I couldn't have repurified you couldn't have repurified she couldn't have repurified we couldn't have repurified you couldn't have repurified they couldn't have repurified	I couldn't have been repurifying you couldn't have been repurifying she couldn't have been repurifying we couldn't have been repurifying you couldn't have been repurifying they couldn't have been repurifying

Interrogative form

Simple form	V-ing form
could I repurify? could you repurify? could she repurify? could we repurify? could you repurify? could they repurify?	could I be repurifying? could you be repurifying? could she be repurifying? could we be repurifying? could you be repurifying? could they be repurifying?
Perfect	V-ing perfect
could I have repurified? could you have repurified? could she have repurified? could we have repurified? could you have repurified? could they have repurified?	could I have been repurifying? could you have been repurifying? could she have been repurifying? could we have been repurifying? could you have been repurifying? could they have been repurifying?

Interro-negative form

Simple form	V-ing form
couldn't I repurify? couldn't you repurify? couldn't she repurify? couldn't we repurify? couldn't you repurify? couldn't they repurify?	couldn't I be repurifying? couldn't you be repurifying? couldn't she be repurifying? couldn't we be repurifying? couldn't you be repurifying? couldn't they be repurifying?
Perfect	V-ing perfect
couldn't I have repurified? couldn't you have repurified? couldn't she have repurified? couldn't we have repurified? couldn't you have repurified? couldn't they have repurified?	couldn't I have been repurifying? couldn't you have been repurifying? couldn't she have been repurifying? couldn't we have been repurifying? couldn't you have been repurifying? couldn't they have been repurifying?