综合英语(二)重点语法：从句(2)

综合英语(二)重点语法：从句(2)

as/which引导定语从句的区别

#

(1)位置不同：as可置于句首，也可置于句中，而which只能放在句中。 #

(2)指代不同。 as引导定语从句时，其先行词为整个主句。which引导非限制性定语从句，其先行词也可以是主句或主句中的一部分。 #

(3)与主动动作先后不同：as从句表示的行为经常是在主句行为之前，而which引导的定语从句表示的却在主句之后，表示连续发生的事情或结果等。

#

As was expected, the England team won the football match. #

He promised to help me, which he did.

He was often late for work, which cost him his job.

#

注意先行词为时间、地点或原因时，关系词的选用 #

如果用when, where 或why，关系词在从句中应该是做状语,否则的话则应该用which / that等。例如： #

I will never forget the days ________ I spent with my friends in the country. #

that/which/ \

exercises #

1. The boy was paid $10 for washing ten windows, most of ____ hadn’t been cleaned for at least a year. (2005/10)

A.those B.these #

C.that D.Which #

2. Anyone ______ has something interesting to concentrate on won't find life boring. (2005/4)

A. whoever B. whomever #

C. who D. which

#

D C #

3. Athletes ______ at the Olympic Games are supposed to be nonprofessionals. (2004/10)

#

A. who compete B. who are competing #

C. who will compete D. who have competed #

4. Television, ______ came into being in 1939, did not become common until the early 1950s. (2004/4)

A. that B. what #

C. which D. it #

A C

#

Adverbial Clauses #

用作状语的从句叫状语从句(adverbial clause).

#