按要求改写句子
Sam has already read the book.（改为一般疑问句）
_____ Sam read the book _________?
Astronauts have already been to the space station. （改为一般疑问句）
__________ astronaut ____________to the space station ?                     
The couple have lived here for 5years. （划线部分提问）
________ ______ have the couple lived here?
Tim has already saved some money.（改为否定句）
Mary _______ saved ________ money yet.