English verb conjugation
COULD LISTEN

Regular verb: listen - listened - listened

Affirmation

Simple form	V-ing form
I could listen you could listen he could listen we could listen you could listen they could listen	I could be listening you could be listening he could be listening we could be listening you could be listening they could be listening
Perfect	V-ing perfect
I could have listened you could have listened he could have listened we could have listened you could have listened they could have listened	I could have been listening you could have been listening he could have been listening we could have been listening you could have been listening they could have been listening

Negation

Simple form	V-ing form
I could not listen you could not listen he could not listen we could not listen you could not listen they could not listen	I could not be listening you could not be listening he could not be listening we could not be listening you could not be listening they could not be listening
Perfect	V-ing perfect
I could not have listened you could not have listened he could not have listened we could not have listened you could not have listened they could not have listened	I could not have been listening you could not have been listening he could not have been listening we could not have been listening you could not have been listening they could not have been listening

Interrogative form

Simple form	V-ing form
could I listen? could you listen? could he listen? could we listen? could you listen? could they listen?	could I be listening? could you be listening? could he be listening? could we be listening? could you be listening? could they be listening?
Perfect	V-ing perfect
could I have listened? could you have listened? could he have listened? could we have listened? could you have listened? could they have listened?	could I have been listening? could you have been listening? could he have been listening? could we have been listening? could you have been listening? could they have been listening?

Interro-negative form

Simple form	V-ing form
could I not listen? could you not listen? could he not listen? could we not listen? could you not listen? could they not listen?	could I not be listening? could you not be listening? could he not be listening? could we not be listening? could you not be listening? could they not be listening?
Perfect	V-ing perfect
could I not have listened? could you not have listened? could he not have listened? could we not have listened? could you not have listened? could they not have listened?	could I not have been listening? could you not have been listening? could he not have been listening? could we not have been listening? could you not have been listening? could they not have been listening?