could rift
Regular verb: rift - rifted- rifted

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could rift
you could rift
he could rift
we could rift
you could rift
they could rift 	I could be rifting
you could be rifting
he could be rifting
we could be rifting
you could be rifting
they could be rifting	I could have rifted
you could have rifted
he could have rifted
we could have rifted
you could have rifted
they could have rifted	I could have been rifting
you could have been rifting
he could have been rifting
we could have been rifting
you could have been rifting
they could have been rifting	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I couldn't rift
you couldn't rift
he couldn't rift
we couldn't rift
you couldn't rift
they couldn't rift 	I couldn't be rifting
you couldn't be rifting
he couldn't be rifting
we couldn't be rifting
you couldn't be rifting
they couldn't be rifting	I couldn't have rifted
you couldn't have rifted
he couldn't have rifted
we couldn't have rifted
you couldn't have rifted
they couldn't have rifted	I couldn't have been rifting
you couldn't have been rifting
he couldn't have been rifting
we couldn't have been rifting
you couldn't have been rifting
they couldn't have been rifting	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I rift?
could you rift?
could he rift?
could we rift?
could you rift?
could they rift? 	could I be rifting?
could you be rifting?
could he be rifting?
could we be rifting?
could you be rifting?
could they be rifting? 	could I have rifted?
could you have rifted?
could he have rifted?
could we have rifted?
could you have rifted?
could they have rifted? 	could I have been rifting?
could you have been rifting?
could he have been rifting?
could we have been rifting?
could you have been rifting?
could they have been rifting? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
couldn't I rift?
couldn't you rift?
couldn't he rift?
couldn't we rift?
couldn't you rift?
couldn't they rift? 	couldn't I be rifting?
couldn't you be rifting?
couldn't he be rifting?
couldn't we be rifting?
couldn't you be rifting?
couldn't they be rifting? 	couldn't I have rifted?
couldn't you have rifted?
couldn't he have rifted?
couldn't we have rifted?
couldn't you have rifted?
couldn't they have rifted? 	couldn't I have been rifting?
couldn't you have been rifting?
couldn't he have been rifting?
couldn't we have been rifting?
couldn't you have been rifting?
couldn't they have been rifting?