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 cannot fix you cannot fix she cannot fix we cannot fix you cannot fix they cannot fix
V-ing form
I cannot be fixing you cannot be fixing she cannot be fixing we cannot be fixing you cannot be fixing they cannot be fixing
Perfect
I cannot have fixed you cannot have fixed she cannot have fixed we cannot have fixed you cannot have fixed they cannot have fixed
V-ing perfect
I cannot have been fixing you cannot have been fixing she cannot have been fixing we cannot have been fixing you cannot have been fixing they cannot 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 I not fix? can you not fix? can she not fix? can we not fix? can you not fix? can they not fix?
V-ing form
can I not be fixing? can you not be fixing? can she not be fixing? can we not be fixing? can you not be fixing? can they not be fixing?
Perfect
can I not have fixed? can you not have fixed? can she not have fixed? can we not have fixed? can you not have fixed? can they not have fixed?
V-ing perfect
can I not have been fixing? can you not have been fixing? can she not have been fixing? can we not have been fixing? can you not have been fixing? can they not have been fixing?