English verb conjugation
CAN EXPOUND

Regular verb: expound - expounded - expounded

Affirmation

Simple form	V-ing form
I can expound you can expound he can expound we can expound you can expound they can expound	I can be expounding you can be expounding he can be expounding we can be expounding you can be expounding they can be expounding
Perfect	V-ing perfect
I can have expounded you can have expounded he can have expounded we can have expounded you can have expounded they can have expounded	I can have been expounding you can have been expounding he can have been expounding we can have been expounding you can have been expounding they can have been expounding

Negation

Simple form	V-ing form
I cannot expound you cannot expound he cannot expound we cannot expound you cannot expound they cannot expound	I cannot be expounding you cannot be expounding he cannot be expounding we cannot be expounding you cannot be expounding they cannot be expounding
Perfect	V-ing perfect
I cannot have expounded you cannot have expounded he cannot have expounded we cannot have expounded you cannot have expounded they cannot have expounded	I cannot have been expounding you cannot have been expounding he cannot have been expounding we cannot have been expounding you cannot have been expounding they cannot have been expounding

Interrogative form

Simple form	V-ing form
can I expound? can you expound? can he expound? can we expound? can you expound? can they expound?	can I be expounding? can you be expounding? can he be expounding? can we be expounding? can you be expounding? can they be expounding?
Perfect	V-ing perfect
can I have expounded? can you have expounded? can he have expounded? can we have expounded? can you have expounded? can they have expounded?	can I have been expounding? can you have been expounding? can he have been expounding? can we have been expounding? can you have been expounding? can they have been expounding?

Interro-negative form

Simple form	V-ing form
can I not expound? can you not expound? can he not expound? can we not expound? can you not expound? can they not expound?	can I not be expounding? can you not be expounding? can he not be expounding? can we not be expounding? can you not be expounding? can they not be expounding?
Perfect	V-ing perfect
can I not have expounded? can you not have expounded? can he not have expounded? can we not have expounded? can you not have expounded? can they not have expounded?	can I not have been expounding? can you not have been expounding? can he not have been expounding? can we not have been expounding? can you not have been expounding? can they not have been expounding?