I can oil you can oil he can oil we can oil you can oil they can oil
V-ing form
I can be oiling you can be oiling he can be oiling we can be oiling you can be oiling they can be oiling
Perfect
I can have oiled you can have oiled he can have oiled we can have oiled you can have oiled they can have oiled
V-ing perfect
I can have been oiling you can have been oiling he can have been oiling we can have been oiling you can have been oiling they can have been oiling
Negation
Simple form
I can't oil you can't oil he can't oil we can't oil you can't oil they can't oil
V-ing form
I can't be oiling you can't be oiling he can't be oiling we can't be oiling you can't be oiling they can't be oiling
Perfect
I can't have oiled you can't have oiled he can't have oiled we can't have oiled you can't have oiled they can't have oiled
V-ing perfect
I can't have been oiling you can't have been oiling he can't have been oiling we can't have been oiling you can't have been oiling they can't have been oiling
Interrogative form
Simple form
can I oil? can you oil? can he oil? can we oil? can you oil? can they oil?
V-ing form
can I be oiling? can you be oiling? can he be oiling? can we be oiling? can you be oiling? can they be oiling?
Perfect
can I have oiled? can you have oiled? can he have oiled? can we have oiled? can you have oiled? can they have oiled?
V-ing perfect
can I have been oiling? can you have been oiling? can he have been oiling? can we have been oiling? can you have been oiling? can they have been oiling?
Interro-negative form
Simple form
can't I oil? can't you oil? can't he oil? can't we oil? can't you oil? can't they oil?
V-ing form
can't I be oiling? can't you be oiling? can't he be oiling? can't we be oiling? can't you be oiling? can't they be oiling?
Perfect
can't I have oiled? can't you have oiled? can't he have oiled? can't we have oiled? can't you have oiled? can't they have oiled?
V-ing perfect
can't I have been oiling? can't you have been oiling? can't he have been oiling? can't we have been oiling? can't you have been oiling? can't they have been oiling?