English verb conjugation
COULD PERCUSS

Regular verb: percuss - percussed - percussed

Affirmation

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

Negation

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

Interrogative form

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

Interro-negative form

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