Oh, that book is super famous. I've never used it, but I've heard about it a lot.
I just reserved my first lesson on JOI for this Tuesday at 2pm. I'll learn:
～こと が/も + ある/ない
there are times when～
The sample sentences:
日本(にほん)のバスは、ほとんど遅(おく)れませんが 雪(ゆき)で遅(おく)れることがあります。/毎晩(まいばん)ニュースを見(み)ていますが、見ないこともあります。
Japan's buses are almost never late, but there are times when they become late due to snow. / I watch the news every night, but there are times when I don't.
I just reserved my first lesson on JOI for this Tuesday at 2pm. I'll learn:
～こと が/も + ある/ない
there are times when～
The sample sentences:
日本(にほん)のバスは、ほとんど遅(おく)れませんが 雪(ゆき)で遅(おく)れることがあります。/毎晩(まいばん)ニュースを見(み)ていますが、見ないこともあります。
Japan's buses are almost never late, but there are times when they become late due to snow. / I watch the news every night, but there are times when I don't.