I can hello you can hello he can hello we can hello you can hello they can hello
V-ing form
I can be helloing you can be helloing he can be helloing we can be helloing you can be helloing they can be helloing
Perfect
I can have helloed you can have helloed he can have helloed we can have helloed you can have helloed they can have helloed
V-ing perfect
I can have been helloing you can have been helloing he can have been helloing we can have been helloing you can have been helloing they can have been helloing
Negation
Simple form
I cannot hello you cannot hello he cannot hello we cannot hello you cannot hello they cannot hello
V-ing form
I cannot be helloing you cannot be helloing he cannot be helloing we cannot be helloing you cannot be helloing they cannot be helloing
Perfect
I cannot have helloed you cannot have helloed he cannot have helloed we cannot have helloed you cannot have helloed they cannot have helloed
V-ing perfect
I cannot have been helloing you cannot have been helloing he cannot have been helloing we cannot have been helloing you cannot have been helloing they cannot have been helloing
Interrogative form
Simple form
can I hello? can you hello? can he hello? can we hello? can you hello? can they hello?
V-ing form
can I be helloing? can you be helloing? can he be helloing? can we be helloing? can you be helloing? can they be helloing?
Perfect
can I have helloed? can you have helloed? can he have helloed? can we have helloed? can you have helloed? can they have helloed?
V-ing perfect
can I have been helloing? can you have been helloing? can he have been helloing? can we have been helloing? can you have been helloing? can they have been helloing?
Interro-negative form
Simple form
can I not hello? can you not hello? can he not hello? can we not hello? can you not hello? can they not hello?
V-ing form
can I not be helloing? can you not be helloing? can he not be helloing? can we not be helloing? can you not be helloing? can they not be helloing?
Perfect
can I not have helloed? can you not have helloed? can he not have helloed? can we not have helloed? can you not have helloed? can they not have helloed?
V-ing perfect
can I not have been helloing? can you not have been helloing? can he not have been helloing? can we not have been helloing? can you not have been helloing? can they not have been helloing?