could restart
Regular verb: restart - restarted- restarted

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could restart
you could restart
he could restart
we could restart
you could restart
they could restart 	I could be restarting
you could be restarting
he could be restarting
we could be restarting
you could be restarting
they could be restarting	I could have restarted
you could have restarted
he could have restarted
we could have restarted
you could have restarted
they could have restarted	I could have been restarting
you could have been restarting
he could have been restarting
we could have been restarting
you could have been restarting
they could have been restarting	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I couldn't restart
you couldn't restart
he couldn't restart
we couldn't restart
you couldn't restart
they couldn't restart 	I couldn't be restarting
you couldn't be restarting
he couldn't be restarting
we couldn't be restarting
you couldn't be restarting
they couldn't be restarting	I couldn't have restarted
you couldn't have restarted
he couldn't have restarted
we couldn't have restarted
you couldn't have restarted
they couldn't have restarted	I couldn't have been restarting
you couldn't have been restarting
he couldn't have been restarting
we couldn't have been restarting
you couldn't have been restarting
they couldn't have been restarting	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I restart?
could you restart?
could he restart?
could we restart?
could you restart?
could they restart? 	could I be restarting?
could you be restarting?
could he be restarting?
could we be restarting?
could you be restarting?
could they be restarting? 	could I have restarted?
could you have restarted?
could he have restarted?
could we have restarted?
could you have restarted?
could they have restarted? 	could I have been restarting?
could you have been restarting?
could he have been restarting?
could we have been restarting?
could you have been restarting?
could they have been restarting? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
couldn't I restart?
couldn't you restart?
couldn't he restart?
couldn't we restart?
couldn't you restart?
couldn't they restart? 	couldn't I be restarting?
couldn't you be restarting?
couldn't he be restarting?
couldn't we be restarting?
couldn't you be restarting?
couldn't they be restarting? 	couldn't I have restarted?
couldn't you have restarted?
couldn't he have restarted?
couldn't we have restarted?
couldn't you have restarted?
couldn't they have restarted? 	couldn't I have been restarting?
couldn't you have been restarting?
couldn't he have been restarting?
couldn't we have been restarting?
couldn't you have been restarting?
couldn't they have been restarting?