You’re right. Koichi has made a mistake there. There should be no だ in that sentence. I double checked what he wrote in that chapter on casual adjectives:

“Good so far? With casual i-adjectives, all you need to do is remove the です. That’s it. End the sentence there and don’t look back. So, if you want to make the above sentences “casual” all you have to do is remove the です.”

He also wrote that Nouns and Na Adjectives conjugate the following ways:

Present/Positive: だ
Past: だった
Negative: じゃない
Past Negative: じゃなかった

On the worksheet you can add a label and put in the correct sentence.

Your welcome. V3 of TF is in the works so they may be waiting til then to fix all the mistakes/errors with Kanji, Vocab, missing audio, decks, etc.

@ Neil

That actually isn’t a mistake. Read Tae Kim’s site to understand it better http://www.guidetojapanese.org/learn/grammar/easyhard. I too thought it was a mistake until someone showed me it. Koichi should state this in the chapter.

A snippet from that page:

“This is a short easy lesson on how to transform verbs into adjectives describing whether that action is easy or difficult to do. Basically, it consists of changing the verb into the stem and adding 「やすい」 for easy and 「にくい」 for hard. The result then becomes a regular i-adjective. Pretty easy, huh?”

• This reply was modified 11 years, 7 months ago by  kanjiman8.