I can shallow you can shallow he can shallow we can shallow you can shallow they can shallow
V-ing form
I can be shallowing you can be shallowing he can be shallowing we can be shallowing you can be shallowing they can be shallowing
Perfect
I can have shallowed you can have shallowed he can have shallowed we can have shallowed you can have shallowed they can have shallowed
V-ing perfect
I can have been shallowing you can have been shallowing he can have been shallowing we can have been shallowing you can have been shallowing they can have been shallowing
Negation
Simple form
I cannot shallow you cannot shallow he cannot shallow we cannot shallow you cannot shallow they cannot shallow
V-ing form
I cannot be shallowing you cannot be shallowing he cannot be shallowing we cannot be shallowing you cannot be shallowing they cannot be shallowing
Perfect
I cannot have shallowed you cannot have shallowed he cannot have shallowed we cannot have shallowed you cannot have shallowed they cannot have shallowed
V-ing perfect
I cannot have been shallowing you cannot have been shallowing he cannot have been shallowing we cannot have been shallowing you cannot have been shallowing they cannot have been shallowing
Interrogative form
Simple form
can I shallow? can you shallow? can he shallow? can we shallow? can you shallow? can they shallow?
V-ing form
can I be shallowing? can you be shallowing? can he be shallowing? can we be shallowing? can you be shallowing? can they be shallowing?
Perfect
can I have shallowed? can you have shallowed? can he have shallowed? can we have shallowed? can you have shallowed? can they have shallowed?
V-ing perfect
can I have been shallowing? can you have been shallowing? can he have been shallowing? can we have been shallowing? can you have been shallowing? can they have been shallowing?
Interro-negative form
Simple form
can I not shallow? can you not shallow? can he not shallow? can we not shallow? can you not shallow? can they not shallow?
V-ing form
can I not be shallowing? can you not be shallowing? can he not be shallowing? can we not be shallowing? can you not be shallowing? can they not be shallowing?
Perfect
can I not have shallowed? can you not have shallowed? can he not have shallowed? can we not have shallowed? can you not have shallowed? can they not have shallowed?
V-ing perfect
can I not have been shallowing? can you not have been shallowing? can he not have been shallowing? can we not have been shallowing? can you not have been shallowing? can they not have been shallowing?