（１）I talked a lot with her while she was staying in Japan.
（２）When he was young, he was very smart.
（３）I watched TV after I ate dinner.
（４）You have to finish your homework before you go to bed.
（５）I will wait for him until he comes back.
（６）Though it was raining, we went out.
（７）I stayed home all day because it was raining.
（８）She was so tired that she didn’t want to eat anything.
（９）As soon as he arrived, he began to eat lunch.
（10）After I finished my homework, I watched TV.
（11）Jack called on Emily while she was out.
（12）I kept reading the book till it got dark.
（13）She didn’t come to school because she was sick.
（14）Although it was cold, I went swimming.
（15）I met her when I was a high school student.
（16）If the weather is nice on Sunday, let’s go for a walk.
（17）I’ll pick him up unless it snows.