I can low you can low he can low we can low you can low they can low
V-ing form
I can be lowing you can be lowing he can be lowing we can be lowing you can be lowing they can be lowing
Perfect
I can have lowed you can have lowed he can have lowed we can have lowed you can have lowed they can have lowed
V-ing perfect
I can have been lowing you can have been lowing he can have been lowing we can have been lowing you can have been lowing they can have been lowing
Negation
Simple form
I cannot low you cannot low he cannot low we cannot low you cannot low they cannot low
V-ing form
I cannot be lowing you cannot be lowing he cannot be lowing we cannot be lowing you cannot be lowing they cannot be lowing
Perfect
I cannot have lowed you cannot have lowed he cannot have lowed we cannot have lowed you cannot have lowed they cannot have lowed
V-ing perfect
I cannot have been lowing you cannot have been lowing he cannot have been lowing we cannot have been lowing you cannot have been lowing they cannot have been lowing
Interrogative form
Simple form
can I low? can you low? can he low? can we low? can you low? can they low?
V-ing form
can I be lowing? can you be lowing? can he be lowing? can we be lowing? can you be lowing? can they be lowing?
Perfect
can I have lowed? can you have lowed? can he have lowed? can we have lowed? can you have lowed? can they have lowed?
V-ing perfect
can I have been lowing? can you have been lowing? can he have been lowing? can we have been lowing? can you have been lowing? can they have been lowing?
Interro-negative form
Simple form
can I not low? can you not low? can he not low? can we not low? can you not low? can they not low?
V-ing form
can I not be lowing? can you not be lowing? can he not be lowing? can we not be lowing? can you not be lowing? can they not be lowing?
Perfect
can I not have lowed? can you not have lowed? can he not have lowed? can we not have lowed? can you not have lowed? can they not have lowed?
V-ing perfect
can I not have been lowing? can you not have been lowing? can he not have been lowing? can we not have been lowing? can you not have been lowing? can they not have been lowing?