English verb conjugation
COULD INTRODUCE

Regular verb: introduce - introduced - introduced

Affirmation

Simple form	V-ing form
I could introduce you could introduce he could introduce we could introduce you could introduce they could introduce	I could be introducing you could be introducing he could be introducing we could be introducing you could be introducing they could be introducing
Perfect	V-ing perfect
I could have introduced you could have introduced he could have introduced we could have introduced you could have introduced they could have introduced	I could have been introducing you could have been introducing he could have been introducing we could have been introducing you could have been introducing they could have been introducing

Negation

Simple form	V-ing form
I could not introduce you could not introduce he could not introduce we could not introduce you could not introduce they could not introduce	I could not be introducing you could not be introducing he could not be introducing we could not be introducing you could not be introducing they could not be introducing
Perfect	V-ing perfect
I could not have introduced you could not have introduced he could not have introduced we could not have introduced you could not have introduced they could not have introduced	I could not have been introducing you could not have been introducing he could not have been introducing we could not have been introducing you could not have been introducing they could not have been introducing

Interrogative form

Simple form	V-ing form
could I introduce? could you introduce? could he introduce? could we introduce? could you introduce? could they introduce?	could I be introducing? could you be introducing? could he be introducing? could we be introducing? could you be introducing? could they be introducing?
Perfect	V-ing perfect
could I have introduced? could you have introduced? could he have introduced? could we have introduced? could you have introduced? could they have introduced?	could I have been introducing? could you have been introducing? could he have been introducing? could we have been introducing? could you have been introducing? could they have been introducing?

Interro-negative form

Simple form	V-ing form
could I not introduce? could you not introduce? could he not introduce? could we not introduce? could you not introduce? could they not introduce?	could I not be introducing? could you not be introducing? could he not be introducing? could we not be introducing? could you not be introducing? could they not be introducing?
Perfect	V-ing perfect
could I not have introduced? could you not have introduced? could he not have introduced? could we not have introduced? could you not have introduced? could they not have introduced?	could I not have been introducing? could you not have been introducing? could he not have been introducing? could we not have been introducing? could you not have been introducing? could they not have been introducing?