English verb conjugation
CAN PERCUSS

Regular verb: percuss - percussed - percussed

Affirmation

Simple form	V-ing form
I can percuss you can percuss he can percuss we can percuss you can percuss they can percuss	I can be percussing you can be percussing he can be percussing we can be percussing you can be percussing they can be percussing
Perfect	V-ing perfect
I can have percussed you can have percussed he can have percussed we can have percussed you can have percussed they can have percussed	I can have been percussing you can have been percussing he can have been percussing we can have been percussing you can have been percussing they can have been percussing

Negation

Simple form	V-ing form
I cannot percuss you cannot percuss he cannot percuss we cannot percuss you cannot percuss they cannot percuss	I cannot be percussing you cannot be percussing he cannot be percussing we cannot be percussing you cannot be percussing they cannot be percussing
Perfect	V-ing perfect
I cannot have percussed you cannot have percussed he cannot have percussed we cannot have percussed you cannot have percussed they cannot have percussed	I cannot have been percussing you cannot have been percussing he cannot have been percussing we cannot have been percussing you cannot have been percussing they cannot have been percussing

Interrogative form

Simple form	V-ing form
can I percuss? can you percuss? can he percuss? can we percuss? can you percuss? can they percuss?	can I be percussing? can you be percussing? can he be percussing? can we be percussing? can you be percussing? can they be percussing?
Perfect	V-ing perfect
can I have percussed? can you have percussed? can he have percussed? can we have percussed? can you have percussed? can they have percussed?	can I have been percussing? can you have been percussing? can he have been percussing? can we have been percussing? can you have been percussing? can they have been percussing?

Interro-negative form

Simple form	V-ing form
can I not percuss? can you not percuss? can he not percuss? can we not percuss? can you not percuss? can they not percuss?	can I not be percussing? can you not be percussing? can he not be percussing? can we not be percussing? can you not be percussing? can they not be percussing?
Perfect	V-ing perfect
can I not have percussed? can you not have percussed? can he not have percussed? can we not have percussed? can you not have percussed? can they not have percussed?	can I not have been percussing? can you not have been percussing? can he not have been percussing? can we not have been percussing? can you not have been percussing? can they not have been percussing?