Simon hadn't expected that he would feel so weak after the operation. → The operation left

Kiến thức về cấu trúc
Tạm dịch: Simon không ngờ rằng mình sẽ cảm thấy yếu như vậy sau ca phẫu thuật.
Ta có cụm từ cố định: leave sb doing sth: khiến, để ai làm gì
=>Do đó, ta viết lại thành: The operation left Simon feeling weaker than he had expected. (Cuộc phẫu thuật khiến Simon cảm thấy yếu hơn anh ta tưởng.)

Simon hadn't expected that he would feel so weak after the operation. → The operation left___________________________________________

Simon hadn't expected that he would feel so weak after the operation.
→ The operation left___________________________________________