托福考试辅导：语法讲解（45）

考点三 表语

系动词be作谓语时，与之搭配的部分被称作表语，表语多由形容词、名词担当，也可是介宾短语、不定式、分词或动名词等
如：He is a doctor.
   It's fantastic.
   She was in hospital.
以上句子中a doctor, fantastic, in hospital就是表语
例题：
(1)
 Quasars----emitting extremely intense radio waves and visible radiation.
 (A) starlike objects are
 (B) starlike, they are objects
 (C) are starlike objects
 (D) are they starlike objects

答案：C
解释：此句缺少谓语，C由系表结构组成，原句中的分词短语恰好作表语的定语。A B 与原句主语冲突，也不符合同位语的要求；D中they和starlike objects重复

(2)
Wherever there is plenty of rain during the growing season, life is ----in various forms.
 (A) abundant
 (B) the abundance
 (C) an abundant
 (D) it abundant

答案：A
解释：空格处需要is的表语，B不可数名词abundance之前不应加the；C少名词；D多代词it; A形容词，恰好作表语