一、关系代词选定要诀 定从要学好，删繁就简系首要，明确先行词，然后定关系词调； 指人主格用who，宾格whom好，事物用which，主/宾都可靠； 用that引定从，人/物均需要，非限制性定从句，切勿用that导； 关系词作宾语，常将其省略掉，若介词 关系词，关系词切勿抛，无论人/事物，who/that均不导，指人必whom，事物which邀； as引定从，（部分）主句内容包，常含“正如”意，位置任意挑； which如此用，用时思量好，有时含“消极”味，主句之后到； such/ the same as，固定搭配好，特殊用法务牢记，勿用乱了套； whose作定语，人/物它全包，n. of whom/which，可与其对调。 二、只用that作关系代词的几种情况 先行（词）本身系数词，不定代词指事物， 人与事物共先行，There be中指物词作主语， 关系词定从中作表语，问句避免疑问词重复， 另有序数词/最高级，every/ the very/ the only， 以及不定代词若干个，名词前把事物来修饰， 以上情况请记清，只能使用that引导定从句。 [巩固练习] 请在横线上添上恰当的关系词。 1. We need comrades _____________ can help us. 2. The man _____________ you saw yesterday was a doctor from Beijing. 3. This is a story about a communist fighter _____________ name或the name of _____________ is Liu Hu-lan. 4. This is our classroom， _____________ windows或the windows of _____________ face the south. 5. Here is a book _____________ will give a lot of useful knowledge. 6. This is the song _____________ we like best. 7. I will never forget the day， on _____________ I first saw him. 8. This is the room _____________ Lao Liu once lived in. 9. Do you still remember the day on _____________ he joined the army？ 10. The earth， _____________ we all know， moves around the sun. 11. _____________ is known to all， the earth is round. 12. The sun is bigger than the earth， _____________ is known to us all. 13. He did not study hard， _____________ led to his failure. 14. We used the same type of machine _____________ they did. 15. We have found such materials _____________ are used in their factory. 16. Here are five fish. The two _____________were caught yesterday are gold fish. 17. Everything _____________ I told you just now is true. 18. They talked of the things and persons _____________ they remembered in the school. 19. There are stars _____________ we still don‘t know in space. 20. Li Ying is not the girl _____________ she used to be ten years ago. [试题答案] 1. who/that 2. who/whom/that/× 3. whose； whom 4. whose； which 5. which/ that 6. which/ × 7. which 8. that/which/ × 9. which 10. as 11. As 12. as/ which 13. which 14. as 15. as 16. that 17. that/ × 18. that/× 19. that/× 20. that