关键词：考研英语、语法、答案解析
在考研英语的备考过程中，语法是不可或缺的一部分。以下是一些典型的考研英语语法问题及其答案解析：
1. 问题：下列哪个选项是正确的时态？
A. I am going to finish the work yesterday.
B. He was working when I arrived.
C. She has been playing the piano for three hours.
D. They had left before I reached the station.
答案：B。本题考查过去进行时，表示在过去某个时间点正在进行的动作。
2. 问题：下列哪个选项是正确的被动语态？
A. The book was written by me.
B. The book has been written by me.
C. I have written the book.
D. I had written the book.
答案：B。本题考查被动语态，表示动作的承受者。
3. 问题：下列哪个选项是正确的非谓语动词？
A. He was felt to be a very intelligent student.
B. He was felt as a very intelligent student.
C. He was considered to be a very intelligent student.
D. He was considered as a very intelligent student.
答案：C。本题考查非谓语动词，表示被动关系。
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