I can fix you can fix she can fix we can fix you can fix they can fix
V-ing form
I can be fixing you can be fixing she can be fixing we can be fixing you can be fixing they can be fixing
Perfect
I can have fixed you can have fixed she can have fixed we can have fixed you can have fixed they can have fixed
V-ing perfect
I can have been fixing you can have been fixing she can have been fixing we can have been fixing you can have been fixing they can have been fixing
Negation
Simple form
I can't fix you can't fix she can't fix we can't fix you can't fix they can't fix
V-ing form
I can't be fixing you can't be fixing she can't be fixing we can't be fixing you can't be fixing they can't be fixing
Perfect
I can't have fixed you can't have fixed she can't have fixed we can't have fixed you can't have fixed they can't have fixed
V-ing perfect
I can't have been fixing you can't have been fixing she can't have been fixing we can't have been fixing you can't have been fixing they can't have been fixing
Interrogative form
Simple form
can I fix? can you fix? can she fix? can we fix? can you fix? can they fix?
V-ing form
can I be fixing? can you be fixing? can she be fixing? can we be fixing? can you be fixing? can they be fixing?
Perfect
can I have fixed? can you have fixed? can she have fixed? can we have fixed? can you have fixed? can they have fixed?
V-ing perfect
can I have been fixing? can you have been fixing? can she have been fixing? can we have been fixing? can you have been fixing? can they have been fixing?
Interro-negative form
Simple form
can't I fix? can't you fix? can't she fix? can't we fix? can't you fix? can't they fix?
V-ing form
can't I be fixing? can't you be fixing? can't she be fixing? can't we be fixing? can't you be fixing? can't they be fixing?
Perfect
can't I have fixed? can't you have fixed? can't she have fixed? can't we have fixed? can't you have fixed? can't they have fixed?
V-ing perfect
can't I have been fixing? can't you have been fixing? can't she have been fixing? can't we have been fixing? can't you have been fixing? can't they have been fixing?