such was his anger that his face turn red.为什么是用such?

such是代词,表示这样的人或这样的事
本句意思：他就是这样,一生气脸就会红.
其他例句：
Such were her words.
她就是这么说的.
Such is their decision.
他们的决定就是这样.
Such can be easily done.
那容易做.