I couldn't
I couldn't see anyone.
Je n'ai pu dormir la nuit dernière.
I couldn't sleep last night.
Je n'ai pu vous offrir un festin de roi.
I wasn't able to offer you a king's feast.
— À bout de course (1988)
Je n'ai pu empêcher Tom de partir.
I couldn't stop Tom from leaving.
I couldn't see anything.
Je cherchais quelque chose, mais je n'ai pu le trouver.
I was looking for something, but I couldn't find it.
Je n'ai pu me faire comprendre en pays étranger.
I couldn't make myself understood in a foreign country.