高二英語上冊專題輔導
c. had bob walked farther
d. if bob walked farther
[考查目標]本題考查虛擬語氣的省略。
[答案與解析]c 虛擬語氣中，條件從句中的if可以
省略。但主語與動詞必須易位；只有were，should，had
等可以放在主語前形成疑問句的詞才有此用法。選項
a中。省略了if，但沒有使用倒裝；選項b、d中，時態
有誤。
【考點4】a better understanding of the environment is
necessary, as is the willingness to act. 更好地了解環境是
必要的。這是心甘情愿的行動。
本句中’as引導定語從句.指代整句話的內容，可置于
句首、句中或句末，表示“正如……”。
【考例4】(上海) ____ has been announced,
we shall have our final exams next month.
a. that b. as c. it d. what
[考查目標]本題考查as引導定語從句的用法。
[答案與解析]b 根據句義可知，本題為定語從句。而
it，what均不能引導定語從句，that引導定語從句時不
能放在句首。
[牛刀小試3]
1. i finally got the job i dreamed about. never in all my
life ____ so happy. ( 京、皖春招)
a. did i feel b. i felt
c. i had felt d. had i felt
2. ____ for the free tickets, i would not have gone
to see the film so often. (1995 上海)
a. if it is not b. were it not
c. had it not been d. if they were not
3. ____ is known to everybody, the moon travels
round the earth once every month. (nmet )
a. it b. as
c. that d. what
4. not until the early years of the 19th century
____ what heat is.
a. man did know b. man knew
c. didn't man know d. did man know
5. ____ is mentioned above, the number of the
students in senior schools is increasing. (1999 上海)
a. which b. as c. that d. it
6. ____ is known to all, china will be an
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