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 can't low you can't low he can't low we can't low you can't low they can't low
V-ing form
I can't be lowing you can't be lowing he can't be lowing we can't be lowing you can't be lowing they can't be lowing
Perfect
I can't have lowed you can't have lowed he can't have lowed we can't have lowed you can't have lowed they can't have lowed
V-ing perfect
I can't have been lowing you can't have been lowing he can't have been lowing we can't have been lowing you can't have been lowing they can't 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't I low? can't you low? can't he low? can't we low? can't you low? can't they low?
V-ing form
can't I be lowing? can't you be lowing? can't he be lowing? can't we be lowing? can't you be lowing? can't they be lowing?
Perfect
can't I have lowed? can't you have lowed? can't he have lowed? can't we have lowed? can't you have lowed? can't they have lowed?
V-ing perfect
can't I have been lowing? can't you have been lowing? can't he have been lowing? can't we have been lowing? can't you have been lowing? can't they have been lowing?