she understands
She doesn't understand you.
Sie versteht keinen Sarkasmus.
She doesn't understand sarcasm.
Sie versteht die russische Sprache ebenso gut wie ihre Muttersprache.
She understands Russian as well as her native language.
She understands his world.
She doesn’t understand you.
She understands you now.
She doesn't understand me either.
Selbst sie versteht mich nicht.
Even she doesn't understand me.