在正式的上下文中，我們可以使用 so 來代替連綴動詞後面的形容詞 (片語)。例如：
- The situation became intolerable five years ago and it remains so even today. (局勢於五年前變得無法容忍，時至今日依然如此)
→ It remains intolerable even today. - Tom is very selfish. He’s been so since his childhood. (湯姆很自私。他從小到大一直都是這樣)
→ He’s been very selfish since his childhood.