English verb conjugation
COULD PRACTICE

Regular verb: practice - practiced - practiced

Affirmation

Simple form	V-ing form
I could practice you could practice he could practice we could practice you could practice they could practice	I could be practicing you could be practicing he could be practicing we could be practicing you could be practicing they could be practicing
Perfect	V-ing perfect
I could have practiced you could have practiced he could have practiced we could have practiced you could have practiced they could have practiced	I could have been practicing you could have been practicing he could have been practicing we could have been practicing you could have been practicing they could have been practicing

Negation

Simple form	V-ing form
I could not practice you could not practice he could not practice we could not practice you could not practice they could not practice	I could not be practicing you could not be practicing he could not be practicing we could not be practicing you could not be practicing they could not be practicing
Perfect	V-ing perfect
I could not have practiced you could not have practiced he could not have practiced we could not have practiced you could not have practiced they could not have practiced	I could not have been practicing you could not have been practicing he could not have been practicing we could not have been practicing you could not have been practicing they could not have been practicing

Interrogative form

Simple form	V-ing form
could I practice? could you practice? could he practice? could we practice? could you practice? could they practice?	could I be practicing? could you be practicing? could he be practicing? could we be practicing? could you be practicing? could they be practicing?
Perfect	V-ing perfect
could I have practiced? could you have practiced? could he have practiced? could we have practiced? could you have practiced? could they have practiced?	could I have been practicing? could you have been practicing? could he have been practicing? could we have been practicing? could you have been practicing? could they have been practicing?

Interro-negative form

Simple form	V-ing form
could I not practice? could you not practice? could he not practice? could we not practice? could you not practice? could they not practice?	could I not be practicing? could you not be practicing? could he not be practicing? could we not be practicing? could you not be practicing? could they not be practicing?
Perfect	V-ing perfect
could I not have practiced? could you not have practiced? could he not have practiced? could we not have practiced? could you not have practiced? could they not have practiced?	could I not have been practicing? could you not have been practicing? could he not have been practicing? could we not have been practicing? could you not have been practicing? could they not have been practicing?