could putrefy
Regular verb: putrefy - putrefied- putrefied

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could putrefy
you could putrefy
he could putrefy
we could putrefy
you could putrefy
they could putrefy 	I could be putrefying
you could be putrefying
he could be putrefying
we could be putrefying
you could be putrefying
they could be putrefying	I could have putrefied
you could have putrefied
he could have putrefied
we could have putrefied
you could have putrefied
they could have putrefied	I could have been putrefying
you could have been putrefying
he could have been putrefying
we could have been putrefying
you could have been putrefying
they could have been putrefying	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I couldn't putrefy
you couldn't putrefy
he couldn't putrefy
we couldn't putrefy
you couldn't putrefy
they couldn't putrefy 	I couldn't be putrefying
you couldn't be putrefying
he couldn't be putrefying
we couldn't be putrefying
you couldn't be putrefying
they couldn't be putrefying	I couldn't have putrefied
you couldn't have putrefied
he couldn't have putrefied
we couldn't have putrefied
you couldn't have putrefied
they couldn't have putrefied	I couldn't have been putrefying
you couldn't have been putrefying
he couldn't have been putrefying
we couldn't have been putrefying
you couldn't have been putrefying
they couldn't have been putrefying	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I putrefy?
could you putrefy?
could he putrefy?
could we putrefy?
could you putrefy?
could they putrefy? 	could I be putrefying?
could you be putrefying?
could he be putrefying?
could we be putrefying?
could you be putrefying?
could they be putrefying? 	could I have putrefied?
could you have putrefied?
could he have putrefied?
could we have putrefied?
could you have putrefied?
could they have putrefied? 	could I have been putrefying?
could you have been putrefying?
could he have been putrefying?
could we have been putrefying?
could you have been putrefying?
could they have been putrefying? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
couldn't I putrefy?
couldn't you putrefy?
couldn't he putrefy?
couldn't we putrefy?
couldn't you putrefy?
couldn't they putrefy? 	couldn't I be putrefying?
couldn't you be putrefying?
couldn't he be putrefying?
couldn't we be putrefying?
couldn't you be putrefying?
couldn't they be putrefying? 	couldn't I have putrefied?
couldn't you have putrefied?
couldn't he have putrefied?
couldn't we have putrefied?
couldn't you have putrefied?
couldn't they have putrefied? 	couldn't I have been putrefying?
couldn't you have been putrefying?
couldn't he have been putrefying?
couldn't we have been putrefying?
couldn't you have been putrefying?
couldn't they have been putrefying?