English verb conjugation
CAN TUNE

Regular verb: tune - tuned - tuned

Affirmation

Simple form	V-ing form
I can tune you can tune he can tune we can tune you can tune they can tune	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	V-ing 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	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	V-ing form
I cannot tune you cannot tune he cannot tune we cannot tune you cannot tune they cannot tune	I cannot be tuning you cannot be tuning he cannot be tuning we cannot be tuning you cannot be tuning they cannot be tuning
Perfect	V-ing perfect
I cannot have tuned you cannot have tuned he cannot have tuned we cannot have tuned you cannot have tuned they cannot have tuned	I cannot have been tuning you cannot have been tuning he cannot have been tuning we cannot have been tuning you cannot have been tuning they cannot have been tuning

Interrogative form

Simple form	V-ing form
can I tune? can you tune? can he tune? can we tune? can you tune? can they tune?	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	V-ing 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?	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	V-ing form
can I not tune? can you not tune? can he not tune? can we not tune? can you not tune? can they not tune?	can I not be tuning? can you not be tuning? can he not be tuning? can we not be tuning? can you not be tuning? can they not be tuning?
Perfect	V-ing perfect
can I not have tuned? can you not have tuned? can he not have tuned? can we not have tuned? can you not have tuned? can they not have tuned?	can I not have been tuning? can you not have been tuning? can he not have been tuning? can we not have been tuning? can you not have been tuning? can they not have been tuning?