I can affix you can affix he can affix we can affix you can affix they can affix
V-ing form
I can be affixing you can be affixing he can be affixing we can be affixing you can be affixing they can be affixing
Perfect
I can have affixed you can have affixed he can have affixed we can have affixed you can have affixed they can have affixed
V-ing perfect
I can have been affixing you can have been affixing he can have been affixing we can have been affixing you can have been affixing they can have been affixing
Negation
Simple form
I can't affix you can't affix he can't affix we can't affix you can't affix they can't affix
V-ing form
I can't be affixing you can't be affixing he can't be affixing we can't be affixing you can't be affixing they can't be affixing
Perfect
I can't have affixed you can't have affixed he can't have affixed we can't have affixed you can't have affixed they can't have affixed
V-ing perfect
I can't have been affixing you can't have been affixing he can't have been affixing we can't have been affixing you can't have been affixing they can't have been affixing
Interrogative form
Simple form
can I affix? can you affix? can he affix? can we affix? can you affix? can they affix?
V-ing form
can I be affixing? can you be affixing? can he be affixing? can we be affixing? can you be affixing? can they be affixing?
Perfect
can I have affixed? can you have affixed? can he have affixed? can we have affixed? can you have affixed? can they have affixed?
V-ing perfect
can I have been affixing? can you have been affixing? can he have been affixing? can we have been affixing? can you have been affixing? can they have been affixing?
Interro-negative form
Simple form
can't I affix? can't you affix? can't he affix? can't we affix? can't you affix? can't they affix?
V-ing form
can't I be affixing? can't you be affixing? can't he be affixing? can't we be affixing? can't you be affixing? can't they be affixing?
Perfect
can't I have affixed? can't you have affixed? can't he have affixed? can't we have affixed? can't you have affixed? can't they have affixed?
V-ing perfect
can't I have been affixing? can't you have been affixing? can't he have been affixing? can't we have been affixing? can't you have been affixing? can't they have been affixing?