1. He was a fool to say that.
⇒It was foolish of him to say that.
Cấu trúc: S+ be + foolish of sb+ to V+O: ngu ngốc khi làm điều gì đó
2.Fiona was so disappointed that she could not keep on working.
⇒Such was Fiona's disappointment that she couldn't keep on working.
Cấu trúc: Đảo ngữ such.. that: Such+ be+ N+ that+ S+ V+O