7、先行词被the only, the very, the same, the last 修饰时,只能用that。
例如:He is the only person that attended the meeting.
6、先行词被序数词或形容词最高级所修饰,只能用that。
例如:This is the most exciting film (that) I have ever seen.
5、先行词是不定代词:all, few, little, much, something, nothing, anything等,只能用that。
例如:That’s all (that)I want to say.
4、that在定语从句中可以指人或物,在从句中作主语或谓语动词的宾语.但不能放在介词后面作介词宾语。
例如:The letter that I received was from my father.
3、关系代词which在非限制性定语从句中不能放在句首,as既能在句首也能在句中.
2、关系代词whom, which, that 在限制性定语从句中作动词宾语或介词宾语,而该介词又位于从句末尾时,经常省略,但as一般不省略.
1、关系代词在从句中作主语时,从句的谓语动词的人称和数必须和先行词保持一致.
41. C 42. C 43. B 44. D 45. D 46. B 47. B 48. B 49. B 50. C
31. B 32. C 33. D 34. B 35. D 36. A 37. A 38. C 39. C 40. C
21. D 22. B 23. D 24. B 25. A 26. B 27. D 28. B 29. C 30. A