初三英语重点复习知识点总结

定语从句中只能用which，不能用that的几种情况：

1. 在介词后面的关系代词用which而不能用that。即“介词+which(代物)” 例如：

The picture for which he paid $1,000 was once owned by a duke.

他花了1000美元买下的画曾为一名公爵所拥有。

The building in which Han Mei studied was very old.

韩梅在里边学习的那幢大楼很旧。

2. 在非限定性定语从句中不能用that。例如：

Crusoe's dog, which was very old now, became ill and died.

克鲁索的狗，现在已经很老了，病死了。

易错点一：关系代词和关系副词的混用。例 1. I’ll never forget the days when I spent in New York with you. 例 2. I’ll never forget the days which I visited New York with you. 析：例 1 中的 when 应改为 which 或 that ;例 2 中的 which 应改为 when .区分关系代词和关系副词的关键是看它们在定语从句中所充当的成分。如果定语从句中缺少主语、宾语，就应考虑使用关系代词，如例 1 ;若定语从句中缺少状语，就应考虑使用关系副词，如例 2 .

易错点二：与强调句型及其他句型的混合。例 7. Was it in the shop that you bought the recorder that you lost your pen? 例 8. You’d better make a mark at where you have any questions. 析：例 7 中第一个 that 应改为 where ;例 8 中应去掉 at .例 7 为带有定语从句的强调句， you bought the recorder 为定语从句，其引导词应用 where ，后面第二个 that 才是强调句中的 that ，此句可还原为： You lost your pen in the shop where you bought the recorder .例 8 为 where 引导的地点状语从句。

1) 单数名词加s: students, apples, bags, trees, books, brothers.

2) 以s、x、sh、ch结尾的名词加es: glasses, boxes, brushes, matches.

3) 以辅音字母加y结尾的名词，变y为i加es: cities, babies, enemies.

4) 以f或fe结尾的名词，多数变f为v加es: wives, knives.但有些词只加s: roofs,proofs, chiefs.

5) 以o结尾的名词，有些加es: Negroes, heroes, tomatoes, potatoes. 其它加s: radio s, zoos, pianos, photos.

6) 不规则名词：foot→feet, goose→geese, tooth→teeth, child→children, man→men, woman→women, mouse→mice.

7) 单复数同形的名词：sheep，fish，dee.

注意：fish表示种类时，也用fishes这样的形式。