では、英文構造を見ていこう…
第１文
It is important to understand that stress doesn’t come from an event itself; that is from the things that are happening in our lives.
※that が３つも登場する。ここでthat の用法と識別法を確認しておく。
that の識別 ①〜⑤
①指示代名詞 : ex. The climate here is milder than that of Tokyo. that=the climateである
②関係代名詞主格: ex. The child and his dog that were crossing the bridge were run over a truck.
※後ろに動詞があるthat は関係代名詞主格と判断。
③関係代名詞目的格: ex. The action that he took was good for everyone.
S V
※後ろにS+Vがあり、意味が通らない不完全文のある場合のthat は、関係代名詞目的格と判断。（但し、しばしば省略）
（続きはその３で述べる。）