1、Book 4 Unit 1难句解析1. This means going back to the place where we left the family sleeping in a tree the night before. (P2)【解析】 going back to the place 为动名词作宾语，sleeping in a tree为动名词作宾语补足语；动名词可在句中作主语、宾语、表语、定语、状语和宾补等。【练习】 用动名词形式完成句子：(1) I remember clearly _ _(在她的办公室见到了她) that day.(2) Though she was at
2、home, she still kept him _ (在外面等了大约一个小时).2. Only after her mother came to help her for the first few months was she allowed to begin her project. (P2)【解析】 Only after her mother came to help her for the first few months为“Only + 状语”位于句首，句子应部分倒装；用only强调时间状语、地点状语、方式状语等时，句子都应部分倒装。但如果only修饰主语，句子则不能倒装。【练习】
3、 单句改错：（1） Only when you realize your mistakes you can correct them.（2） Only did some of the students pass the examination.3. Suddenly it hit me how difficult it was for a woman to get medical training at that time. (P6)【解析】 it 为形式主语，真正的主语为how difficult it was for a woman to get medical training at t
4、hat time。在英语中当主语为动词不定式短语、动名词短语或句子时，为避免句子头重脚轻，常将真正的主语放在后面，而用it作形式主语。【练习】 完成句子：（1） It is impossible _ (你在两周之内完成这项工作).（2） I hate it _ (如果年轻人那样跟老人说话).4. Further reading made me realize that it was hard work and determination as well as her gentle nature that got her into medical school. (P6)【解析】 that it
5、 was hard work and determination as well as her gentle nature that got her into medical school是名词性从句作谓语realize 的宾语，而 it was hard work and determination as well as her gentle nature that got her into medical school使用了强调句型。【练习】 翻译句子：（1） 他的不辞而别使我意识到是我的无礼使他生气了。（2） 直到老师进来学生们才开始准备功课。参考答案1. (1) meeting her
6、 in her office (2) waiting outside about an hour 2. (1) you can改为 can you (2) 去掉did并将pass改为passed3. (1) that you will finish the work in two weeks /for you to finish the work in two weeks (2) if young people speak to the old like that 4. (1) His leaving without a word made me realize that it was my rude manners that made him angry.(2) It was not until the teacher came in that the students began to prepare their lessons.
