I could capsize you could capsize he could capsize we could capsize you could capsize they could capsize
V-ing form
I could be capsizing you could be capsizing he could be capsizing we could be capsizing you could be capsizing they could be capsizing
Perfect
I could have capsized you could have capsized he could have capsized we could have capsized you could have capsized they could have capsized
V-ing perfect
I could have been capsizing you could have been capsizing he could have been capsizing we could have been capsizing you could have been capsizing they could have been capsizing
Negation
Simple form
I couldn't capsize you couldn't capsize he couldn't capsize we couldn't capsize you couldn't capsize they couldn't capsize
V-ing form
I couldn't be capsizing you couldn't be capsizing he couldn't be capsizing we couldn't be capsizing you couldn't be capsizing they couldn't be capsizing
Perfect
I couldn't have capsized you couldn't have capsized he couldn't have capsized we couldn't have capsized you couldn't have capsized they couldn't have capsized
V-ing perfect
I couldn't have been capsizing you couldn't have been capsizing he couldn't have been capsizing we couldn't have been capsizing you couldn't have been capsizing they couldn't have been capsizing
Interrogative form
Simple form
could I capsize? could you capsize? could he capsize? could we capsize? could you capsize? could they capsize?
V-ing form
could I be capsizing? could you be capsizing? could he be capsizing? could we be capsizing? could you be capsizing? could they be capsizing?
Perfect
could I have capsized? could you have capsized? could he have capsized? could we have capsized? could you have capsized? could they have capsized?
V-ing perfect
could I have been capsizing? could you have been capsizing? could he have been capsizing? could we have been capsizing? could you have been capsizing? could they have been capsizing?
Interro-negative form
Simple form
couldn't I capsize? couldn't you capsize? couldn't he capsize? couldn't we capsize? couldn't you capsize? couldn't they capsize?
V-ing form
couldn't I be capsizing? couldn't you be capsizing? couldn't he be capsizing? couldn't we be capsizing? couldn't you be capsizing? couldn't they be capsizing?
Perfect
couldn't I have capsized? couldn't you have capsized? couldn't he have capsized? couldn't we have capsized? couldn't you have capsized? couldn't they have capsized?
V-ing perfect
couldn't I have been capsizing? couldn't you have been capsizing? couldn't he have been capsizing? couldn't we have been capsizing? couldn't you have been capsizing? couldn't they have been capsizing?