I could rationalize you could rationalize he could rationalize we could rationalize you could rationalize they could rationalize
V-ing form
I could be rationalizing you could be rationalizing he could be rationalizing we could be rationalizing you could be rationalizing they could be rationalizing
Perfect
I could have rationalized you could have rationalized he could have rationalized we could have rationalized you could have rationalized they could have rationalized
V-ing perfect
I could have been rationalizing you could have been rationalizing he could have been rationalizing we could have been rationalizing you could have been rationalizing they could have been rationalizing
Negation
Simple form
I could not rationalize you could not rationalize he could not rationalize we could not rationalize you could not rationalize they could not rationalize
V-ing form
I could not be rationalizing you could not be rationalizing he could not be rationalizing we could not be rationalizing you could not be rationalizing they could not be rationalizing
Perfect
I could not have rationalized you could not have rationalized he could not have rationalized we could not have rationalized you could not have rationalized they could not have rationalized
V-ing perfect
I could not have been rationalizing you could not have been rationalizing he could not have been rationalizing we could not have been rationalizing you could not have been rationalizing they could not have been rationalizing
Interrogative form
Simple form
could I rationalize? could you rationalize? could he rationalize? could we rationalize? could you rationalize? could they rationalize?
V-ing form
could I be rationalizing? could you be rationalizing? could he be rationalizing? could we be rationalizing? could you be rationalizing? could they be rationalizing?
Perfect
could I have rationalized? could you have rationalized? could he have rationalized? could we have rationalized? could you have rationalized? could they have rationalized?
V-ing perfect
could I have been rationalizing? could you have been rationalizing? could he have been rationalizing? could we have been rationalizing? could you have been rationalizing? could they have been rationalizing?
Interro-negative form
Simple form
could I not rationalize? could you not rationalize? could he not rationalize? could we not rationalize? could you not rationalize? could they not rationalize?
V-ing form
could I not be rationalizing? could you not be rationalizing? could he not be rationalizing? could we not be rationalizing? could you not be rationalizing? could they not be rationalizing?
Perfect
could I not have rationalized? could you not have rationalized? could he not have rationalized? could we not have rationalized? could you not have rationalized? could they not have rationalized?
V-ing perfect
could I not have been rationalizing? could you not have been rationalizing? could he not have been rationalizing? could we not have been rationalizing? could you not have been rationalizing? could they not have been rationalizing?