If I no longer know which is dearer, you, who represent my dreams, or my dreams, which have become embodied in yourself, will you on that account be less fondly and less nobly loved?
Darkness has fallen suddenly between her and me; and I no longer know to whom I am speaking; I no longer know what soul hears me nor at what heart I knocked!
No doubt it is because you and your people work, whereas I do nothing, because you love one another and believe in your efforts, whereas I no longer know how to love or believe.
The above list will hopefully provide you with a few useful examples demonstrating the appropriate usage of "longer know" in a variety of sentences. We hope that you will now be able to make sentences using this group of words.