"i had to ad lib because i had forgotten my notes" in German I had to ad-lib because I had forgotten my notes. Ich musste improvisieren, denn ich hatte mein Konzept vergessen. Detailed translations for "i had to ad lib because i had forgotten my notes" I had to ad-lib because I had forgotten my notes. I had to ad-lib because I had forgotten my notes. Ich musste improvisieren, denn ich hatte mein Konzept vergessen.