I can tune you can tune he can tune we can tune you can tune they can tune
V-ing form
I can be tuning you can be tuning he can be tuning we can be tuning you can be tuning they can be tuning
Perfect
I can have tuned you can have tuned he can have tuned we can have tuned you can have tuned they can have tuned
V-ing perfect
I can have been tuning you can have been tuning he can have been tuning we can have been tuning you can have been tuning they can have been tuning
Negation
Simple form
I can't tune you can't tune he can't tune we can't tune you can't tune they can't tune
V-ing form
I can't be tuning you can't be tuning he can't be tuning we can't be tuning you can't be tuning they can't be tuning
Perfect
I can't have tuned you can't have tuned he can't have tuned we can't have tuned you can't have tuned they can't have tuned
V-ing perfect
I can't have been tuning you can't have been tuning he can't have been tuning we can't have been tuning you can't have been tuning they can't have been tuning
Interrogative form
Simple form
can I tune? can you tune? can he tune? can we tune? can you tune? can they tune?
V-ing form
can I be tuning? can you be tuning? can he be tuning? can we be tuning? can you be tuning? can they be tuning?
Perfect
can I have tuned? can you have tuned? can he have tuned? can we have tuned? can you have tuned? can they have tuned?
V-ing perfect
can I have been tuning? can you have been tuning? can he have been tuning? can we have been tuning? can you have been tuning? can they have been tuning?
Interro-negative form
Simple form
can't I tune? can't you tune? can't he tune? can't we tune? can't you tune? can't they tune?
V-ing form
can't I be tuning? can't you be tuning? can't he be tuning? can't we be tuning? can't you be tuning? can't they be tuning?
Perfect
can't I have tuned? can't you have tuned? can't he have tuned? can't we have tuned? can't you have tuned? can't they have tuned?
V-ing perfect
can't I have been tuning? can't you have been tuning? can't he have been tuning? can't we have been tuning? can't you have been tuning? can't they have been tuning?