Je ne comprends pas cette question, répétez, s'il vous plaît.
I don't understand this question, please repeat it.
Hier, j'ai avoué que je ne comprends pas le texte.
Yesterday, I admitted that I don't understand the text.
Demain, si je ne comprends pas, je demanderai.
Tomorrow, if I don't understand, I will ask.
Remember je ne comprends pas for good. ripiti brings the word back just before you forget it, with these sentences. Free, no account needed, works offline.