PETS 語法輔導:主謂一致
主謂一致是指:
1) 語法形式上要一致,即單復數形式與謂語要一致。
2) 意義上要一致,即主語意義上的單復數要與謂語的單復數形式一致。
3) 就近原則,即謂語動詞的單復形式取決于最靠近它的詞語。
一般來說,不可數名詞用動詞單數,可數名詞復數用動詞復數。
There is much water in the thermos.
但當不可數名詞前有表示數量的復數名詞時,謂語動詞用復數形式。
Ten thousand tons of coal were produced last year.
一 并列結構作主語時謂語用復數
Reading and writing are very important. 注意: 當主語由and連結時,如果它表示一個單一的概念,即指同一人或同一物時,謂語動詞用單數,and 此時連接的兩個詞前只有一個冠詞。The iron and steel industry is very important to our life.
典型例題
The League secretary and monitor ___ asked to make a speech at the meeting.
A. is B. was C. are D. were
答案B. 注: 先從時態上考慮。這是過去發生的事情應用過去時,先排除A.,C.。本題易誤選D,因為The League secretary and monitor 好象是兩個人,但仔細辨別, monitor 前沒有the,在英語中,當一人兼數職時只在第一個職務前加定冠詞。后面的職務用and 相連。這樣本題主語為一個人,所以應選B。
二 主謂一致中的靠近原則
1)當there be 句型的主語是一系列事物時,謂語應與最鄰近的主語保持一致。
There is a pen, a knife and several books on the desk..
There are twenty boy-students and twenty-three girl-students in the class.
2)當either… or… 與neither… nor, 連接兩個主語時,謂語動詞與最鄰近的主語保持一致。 如果句子是由here, there引導,而主語又不止一個時,謂語通常也和最鄰近的主語一致。
Either you or she is to go.
Here is a pen, a few envelops and some paper for you.
三 謂語動詞與前面的主語一致
當主語后面跟有with, together with, like, except, but, no less than, as well as 等詞引起的短語時,謂語動詞與前面的主語一致。
The teacher together with some students is visiting the factory.
He as well as I wants to go boating.
四 謂語需用單數
1) 代詞each和由every, some, no, any等構成的復合代詞作主語,或主語中含有each, every, 謂語需用單數。
Each of us has a tape-recorder.
There is something wrong with my watch.
2) 當主語是一本書或一條格言時,謂語動詞常用單數。
The Arabian Night is a book known to lovers of English.
<<天方夜譚>>是英語愛好者熟悉的一本好書。
3) 表示金錢,時間,價格或度量衡的復合名詞作主語 時,通常把這些名詞看作一個整體,謂語一般用單數。(用復數也可,意思不變。)
Three weeks was allowed for making the necessary preparations.
Ten yuan is enough.