Diary
I am a former student of Japanese language in Japan. The other day was the final lecture of my former teacher at university.
He explained that the place he bought his hat from was not the same place in the following two sentences.
a アメリカへ行くときに帽子を買った。
b アメリカへ行ったときに帽子を買った。
In sentence b, the hat was bought in the U.S., but in sentence a, the hat was bought in Japan. The teacher explained in detail why this was the case, but I could not fully understand it.
by resignater