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