题目内容：

句型转换

按要求改写下列句子，每空一词。

1.Have you ever been to a science museum？（做否定回答）

_________, I ___________.

2. I have already finished reading the book.(改为一般疑问句)

_________ you finished reading the book ________?

3. She studies English by asking the teacher for help.（就划线部分提问）

_________ does she ________ English?

4.The film began half an hour ago.(改为同义句)

The film ______  ______  _______ _______ half an hour .