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 cannot oil you cannot oil he cannot oil we cannot oil you cannot oil they cannot oil
V-ing form
I cannot be oiling you cannot be oiling he cannot be oiling we cannot be oiling you cannot be oiling they cannot be oiling
Perfect
I cannot have oiled you cannot have oiled he cannot have oiled we cannot have oiled you cannot have oiled they cannot have oiled
V-ing perfect
I cannot have been oiling you cannot have been oiling he cannot have been oiling we cannot have been oiling you cannot have been oiling they cannot 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 I not oil? can you not oil? can he not oil? can we not oil? can you not oil? can they not oil?
V-ing form
can I not be oiling? can you not be oiling? can he not be oiling? can we not be oiling? can you not be oiling? can they not be oiling?
Perfect
can I not have oiled? can you not have oiled? can he not have oiled? can we not have oiled? can you not have oiled? can they not have oiled?
V-ing perfect
can I not have been oiling? can you not have been oiling? can he not have been oiling? can we not have been oiling? can you not have been oiling? can they not have been oiling?