間違いやすい英語 動詞から派生する形容詞（能動~ing・受動~ed）

specialize [in sth] 自動詞
to become an expert in a particular area of work, study or business; to spend more time on one area of work, etc. than others

We are a company specializing in event planning. 
We are a company specialized in event planning.

両方OK

satisfy 他動詞
to make someone feel pleased by doing what they want

The result was satisfying.
We are satisfied with the result.

意味が変わってしまう。

同様にbore, interest, などの動詞がある。