English verb conjugation
COULD ADVANCE

Regular verb: advance - advanced - advanced

Affirmation

Simple form	V-ing form
I could advance you could advance he could advance we could advance you could advance they could advance	I could be advancing you could be advancing he could be advancing we could be advancing you could be advancing they could be advancing
Perfect	V-ing perfect
I could have advanced you could have advanced he could have advanced we could have advanced you could have advanced they could have advanced	I could have been advancing you could have been advancing he could have been advancing we could have been advancing you could have been advancing they could have been advancing

Negation

Simple form	V-ing form
I could not advance you could not advance he could not advance we could not advance you could not advance they could not advance	I could not be advancing you could not be advancing he could not be advancing we could not be advancing you could not be advancing they could not be advancing
Perfect	V-ing perfect
I could not have advanced you could not have advanced he could not have advanced we could not have advanced you could not have advanced they could not have advanced	I could not have been advancing you could not have been advancing he could not have been advancing we could not have been advancing you could not have been advancing they could not have been advancing

Interrogative form

Simple form	V-ing form
could I advance? could you advance? could he advance? could we advance? could you advance? could they advance?	could I be advancing? could you be advancing? could he be advancing? could we be advancing? could you be advancing? could they be advancing?
Perfect	V-ing perfect
could I have advanced? could you have advanced? could he have advanced? could we have advanced? could you have advanced? could they have advanced?	could I have been advancing? could you have been advancing? could he have been advancing? could we have been advancing? could you have been advancing? could they have been advancing?

Interro-negative form

Simple form	V-ing form
could I not advance? could you not advance? could he not advance? could we not advance? could you not advance? could they not advance?	could I not be advancing? could you not be advancing? could he not be advancing? could we not be advancing? could you not be advancing? could they not be advancing?
Perfect	V-ing perfect
could I not have advanced? could you not have advanced? could he not have advanced? could we not have advanced? could you not have advanced? could they not have advanced?	could I not have been advancing? could you not have been advancing? could he not have been advancing? could we not have been advancing? could you not have been advancing? could they not have been advancing?