【知识点详解】
1. "used to" 短语用法
"used to" 是一个表示过去习惯或过去经常发生的动作或状态的短语，它指的是某个行为或情况在过去是常态，但现在已不再如此。例如："She used to be shy, but now she is outgoing." 这个短语后面接动词原形，适用于所有的人称。否定形式是 "didn't use to do..."，疑问形式是 "Did + 主语 + use to...?"。反义疑问句形式如 "You used to be short, didn't you?"。
2. 句型结构与例句
- 肯定句：I used to be very clever. （我过去很聪明。）
- 否定句：You didn't use to have long hair. （你过去没有长头发。）
- 疑问句：Did you use to have straight hair? Yes, I did. / No, I didn’t. （你过去是直发吗？是的，我是。/ 不，我不是。）
- 反义疑问句：He didn't use to smoke, did he? （他过去不抽烟，是吗？）
3. "used to do" 与其他表达"used"的短语区别
- "used to do sth." 表示过去常常做某事，如 "Uncle Tom used to get up late."
- "be used to do sth." 或 "be used for doing sth." 意为被用来做某事，例如 "The pens are used for writing."
- "be used to sth./doing sth." 指的是对某事物或行为的习惯，如 "You seem to be used to living in Beijing now."
4. 练习答案
1. Uncle Tom used to get up late. But now he gets up early every day.
2. You seem to be used to living in Beijing now.
3. The pens are used for writing.
4. Do you like the food here?
5. Did he use to walk to school?
5. 中考链接
- 一般将来时 (will do)：He will write to us as soon as he gets there.
- 过去将来时 (would do)：He said he would visit Paris next year.
- 现在完成时 (have/has done)：I have seen that movie twice.
- 条件状语从句：There will be a sports meeting if it doesn't rain tomorrow.
- 宾语从句：She wondered if he would return tomorrow.
- 现在完成时：We haven't seen each other since three years ago.
- 一般将来时：The train will leave in ten minutes.
- 过去将来时：John asked how many trees we would plant next year.
- 现在完成时：In the last few years, our town has changed a lot.
- 现在完成时：I have never met him before.
请注意，第11题缺少了部分句子，无法提供完整的答案。
