句型转换是初中英语的必考题型，掌握核心转换规则即可举一反三。
要点讲解
- 肯定句变否定：有 be/情态动词/助动词在其后加 not；实义动词用 don't/doesn't/didn't + 动词原形。
- 肯定句变一般疑问句：be/情态/助动词提前；实义动词用 Do/Does/Did + 主语 + 动词原形。
- 对划线部分提问：先确定疑问词，再把剩余部分变为一般疑问句：I like music. → What do you like?
- 变单复数句：主语、谓语、名词同步变：This is a book. → These are books.
- 变感叹句：看中心词定 what/how：The girl is beautiful. → How beautiful the girl is!
- 变被动语态：宾语变主语、动词变 be+done、主语变 by 短语。
- 变反意疑问句：前肯后否/前否后肯。
- 变间接引语：人称、时态、时间状语三变。
- 同义句转换：so...that ↔ too...to ↔ enough to；not...until ↔ after；as...as possible ↔ as...as sb. can。
- 合并为宾语从句：连接词 + 陈述语序 + 时态调整。
经典例句
- She is doing her homework.（变否定）→ She isn't doing her homework.
她正在做作业。→ 她没有在做作业。 - They went to the zoo yesterday.（变一般疑问）→ Did they go to the zoo yesterday?
他们昨天去了动物园。→ 他们昨天去动物园了吗？ - He is so young that he can't go to school.（变同义句）→ He is too young to go to school.
他太小不能上学。→ 他太小不能上学。
易错提醒
- 句型转换五步：找准谓语动词→判断时态→加/变助动词→调语序→改人称数。