I could arabize you could arabize she could arabize we could arabize you could arabize they could arabize
V-ing form
I could be arabizing you could be arabizing she could be arabizing we could be arabizing you could be arabizing they could be arabizing
Perfect
I could have arabized you could have arabized she could have arabized we could have arabized you could have arabized they could have arabized
V-ing perfect
I could have been arabizing you could have been arabizing she could have been arabizing we could have been arabizing you could have been arabizing they could have been arabizing
Negation
Simple form
I couldn't arabize you couldn't arabize she couldn't arabize we couldn't arabize you couldn't arabize they couldn't arabize
V-ing form
I couldn't be arabizing you couldn't be arabizing she couldn't be arabizing we couldn't be arabizing you couldn't be arabizing they couldn't be arabizing
Perfect
I couldn't have arabized you couldn't have arabized she couldn't have arabized we couldn't have arabized you couldn't have arabized they couldn't have arabized
V-ing perfect
I couldn't have been arabizing you couldn't have been arabizing she couldn't have been arabizing we couldn't have been arabizing you couldn't have been arabizing they couldn't have been arabizing
Interrogative form
Simple form
could I arabize? could you arabize? could she arabize? could we arabize? could you arabize? could they arabize?
V-ing form
could I be arabizing? could you be arabizing? could she be arabizing? could we be arabizing? could you be arabizing? could they be arabizing?
Perfect
could I have arabized? could you have arabized? could she have arabized? could we have arabized? could you have arabized? could they have arabized?
V-ing perfect
could I have been arabizing? could you have been arabizing? could she have been arabizing? could we have been arabizing? could you have been arabizing? could they have been arabizing?
Interro-negative form
Simple form
couldn't I arabize? couldn't you arabize? couldn't she arabize? couldn't we arabize? couldn't you arabize? couldn't they arabize?
V-ing form
couldn't I be arabizing? couldn't you be arabizing? couldn't she be arabizing? couldn't we be arabizing? couldn't you be arabizing? couldn't they be arabizing?
Perfect
couldn't I have arabized? couldn't you have arabized? couldn't she have arabized? couldn't we have arabized? couldn't you have arabized? couldn't they have arabized?
V-ing perfect
couldn't I have been arabizing? couldn't you have been arabizing? couldn't she have been arabizing? couldn't we have been arabizing? couldn't you have been arabizing? couldn't they have been arabizing?