1. Used to emphasize that something is excluded or does not occur, even in the minimum degree
He didn't even try to help.
Ele nem sequer tentou ajudar.
2. To indicate that the slightest action, effort, or consideration was absent
She didn't even look at me.
Ela nem sequer olhou para mim.
3. To express surprise or disappointment at the complete absence of something expected
He didn't even acknowledge my presence.
Ele nem sequer reconheceu minha presença.