I can shrill you can shrill he can shrill we can shrill you can shrill they can shrill
V-ing form
I can be shrilling you can be shrilling he can be shrilling we can be shrilling you can be shrilling they can be shrilling
Perfect
I can have shrilled you can have shrilled he can have shrilled we can have shrilled you can have shrilled they can have shrilled
V-ing perfect
I can have been shrilling you can have been shrilling he can have been shrilling we can have been shrilling you can have been shrilling they can have been shrilling
Negation
Simple form
I cannot shrill you cannot shrill he cannot shrill we cannot shrill you cannot shrill they cannot shrill
V-ing form
I cannot be shrilling you cannot be shrilling he cannot be shrilling we cannot be shrilling you cannot be shrilling they cannot be shrilling
Perfect
I cannot have shrilled you cannot have shrilled he cannot have shrilled we cannot have shrilled you cannot have shrilled they cannot have shrilled
V-ing perfect
I cannot have been shrilling you cannot have been shrilling he cannot have been shrilling we cannot have been shrilling you cannot have been shrilling they cannot have been shrilling
Interrogative form
Simple form
can I shrill? can you shrill? can he shrill? can we shrill? can you shrill? can they shrill?
V-ing form
can I be shrilling? can you be shrilling? can he be shrilling? can we be shrilling? can you be shrilling? can they be shrilling?
Perfect
can I have shrilled? can you have shrilled? can he have shrilled? can we have shrilled? can you have shrilled? can they have shrilled?
V-ing perfect
can I have been shrilling? can you have been shrilling? can he have been shrilling? can we have been shrilling? can you have been shrilling? can they have been shrilling?
Interro-negative form
Simple form
can I not shrill? can you not shrill? can he not shrill? can we not shrill? can you not shrill? can they not shrill?
V-ing form
can I not be shrilling? can you not be shrilling? can he not be shrilling? can we not be shrilling? can you not be shrilling? can they not be shrilling?
Perfect
can I not have shrilled? can you not have shrilled? can he not have shrilled? can we not have shrilled? can you not have shrilled? can they not have shrilled?
V-ing perfect
can I not have been shrilling? can you not have been shrilling? can he not have been shrilling? can we not have been shrilling? can you not have been shrilling? can they not have been shrilling?