定語從句講解：先行詞和關系詞的區(qū)別

　　定語從句講解：先行詞和關系詞的區(qū)別：

　　1)Whoever spits in public will be punished here.(“Whoever”可以用“anyone who”代替)

　　2)The parents will use what they have to send their son to technical school. (“what”可以用“all that”代替)

　　但這兩句句子已經(jīng)不是定語從句了，是名詞性從句。因為定語從句一定要有先行詞，而名詞性從句沒有。將“Whoever”、“what”分別用“Anyone who”、“all that”代替后，才是定語從句，先行詞分別是“Anyone”、“all”。

　　An invitation from her boss, ___came as a surprise.

　　A. it　B. that　C. which　D. he

　　答案C。

　　a選項it，使前后成為兩個句子，中間無連詞連接，語法錯誤;b項that，此為非限定性從句，不能用“that”修飾;c選項which，which在從句中做主語，用來代指前面的這件事;d選項he;前半句中是her boss，所以不正確。

　　2)The weather turned out to be very good, ___ was more than we could expect.

　　A. what　B. which　C. that　D. it

　　答案B

　　A選項不能用來引導定語從句，C選項只能引導限定性定語從句，而D選項習慣上并不適用。

　　3)It rained hard yesterday, ____ prevented me from going to the park.[2]

　　A. that　B. which　C. as　D. it

　　答案B