English verb conjugation
COULD PREEXAMINE

Regular verb: preexamine - preexamined - preexamined

Affirmation

Simple form	V-ing form
I could preexamine you could preexamine he could preexamine we could preexamine you could preexamine they could preexamine	I could be preexamining you could be preexamining he could be preexamining we could be preexamining you could be preexamining they could be preexamining
Perfect	V-ing perfect
I could have preexamined you could have preexamined he could have preexamined we could have preexamined you could have preexamined they could have preexamined	I could have been preexamining you could have been preexamining he could have been preexamining we could have been preexamining you could have been preexamining they could have been preexamining

Negation

Simple form	V-ing form
I could not preexamine you could not preexamine he could not preexamine we could not preexamine you could not preexamine they could not preexamine	I could not be preexamining you could not be preexamining he could not be preexamining we could not be preexamining you could not be preexamining they could not be preexamining
Perfect	V-ing perfect
I could not have preexamined you could not have preexamined he could not have preexamined we could not have preexamined you could not have preexamined they could not have preexamined	I could not have been preexamining you could not have been preexamining he could not have been preexamining we could not have been preexamining you could not have been preexamining they could not have been preexamining

Interrogative form

Simple form	V-ing form
could I preexamine? could you preexamine? could he preexamine? could we preexamine? could you preexamine? could they preexamine?	could I be preexamining? could you be preexamining? could he be preexamining? could we be preexamining? could you be preexamining? could they be preexamining?
Perfect	V-ing perfect
could I have preexamined? could you have preexamined? could he have preexamined? could we have preexamined? could you have preexamined? could they have preexamined?	could I have been preexamining? could you have been preexamining? could he have been preexamining? could we have been preexamining? could you have been preexamining? could they have been preexamining?

Interro-negative form

Simple form	V-ing form
could I not preexamine? could you not preexamine? could he not preexamine? could we not preexamine? could you not preexamine? could they not preexamine?	could I not be preexamining? could you not be preexamining? could he not be preexamining? could we not be preexamining? could you not be preexamining? could they not be preexamining?
Perfect	V-ing perfect
could I not have preexamined? could you not have preexamined? could he not have preexamined? could we not have preexamined? could you not have preexamined? could they not have preexamined?	could I not have been preexamining? could you not have been preexamining? could he not have been preexamining? could we not have been preexamining? could you not have been preexamining? could they not have been preexamining?