The story
After two years of studying English I went abroad for the first time.
At the airport a man asked me a simple question.
I understood every word, and I could not produce an answer.
He waited, then said it was fine and walked away.
I sat down and seriously thought about giving up.
Two years of work and I could not answer one question.
On the flight home I tried to understand what had gone wrong.
I had read thousands of pages. I had done hundreds of exercises.
But I had almost never spoken out loud.
I had been training one skill and testing a different one.
So I changed one thing. Every day I spoke for ten minutes, alone, out loud.
It felt ridiculous for about three weeks.
Then it stopped feeling ridiculous and started feeling normal.
Progress in a language can be hard to notice from one day to the next.