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