《新概念英语》第一册第99课 Ow! 啊哟！
LUCY: What's the matter, Andy?
ANDY: I slipped and fell downstairs.
LUCY: Have you hurt yourself?
ANDY: Yes, I have. I think that I've hurt my back.
LUCY: Try and stand up. Can you stand up? Here. Let me help you.
ANDY: I'm sorry, Lucy. I'm afraid that I can't get up.
LUCY: I think that the doctor had better see you. I'll phone Dr. Carter.
LUCY: The doctor says that he will come at once. I'm sure that you need an X-ray, Andy.
I think that I've hurt my back.
（我想+我伤了我的背。I think + that + ...）
I'm afraid that I can't get up.
（我恐怕+我起不来了。I'm afriad + that +...）
I think that the doctor had better see you.
（我想+你最好去看医生。I think + that...）
The doctor says that he will come at once.
（医生说+他马上来。The doctor says + that +...）
I'm sure that you need an X-ray.
（我肯定+你需要拍X光。I'm sure + that + ...）
它们都有一个规律，就是前面的小句"I think...", "I'm afraid..." 等 + that + 完整的句子。大家可以把它理解为中文中的间接引语。翻译的语序和中文都是一样的，只要在前面的小句和后面完整的句子中间加入that就好了。大家来试试看造个句子吧！
2. fell downstairs, 从楼上摔下来。downstairs是副词，修饰fell作状语。