7、trousers, glasses, clothes, shoes, 等詞作主語時，謂語用復(fù)數(shù)，但如果這些名詞前有a (the) pair of等量詞修飾時，謂語動詞用單數(shù)。如：My glasses are broken. / The pair of shoes under the bed is his.

6、一些學(xué)科名詞是以 –ics 結(jié)尾，如：mathematics, politics, physics 以及news, works等，都屬于形式上是復(fù)數(shù)的名詞，實際意義為單數(shù)名詞，它們作主語時，其謂語動詞要用單數(shù)形式。如：The paper works was built in 1990. / I think physics isn’t easy to study.

5、算式中表示數(shù)目(字)的主語通常作單數(shù)看待，其謂語動詞采用單數(shù)形式。如：Twelve plus eight is twenty. / Fifty-six divided by eight is seven.

4、表數(shù)量的短語“one and a half”后接復(fù)數(shù)名詞作主語時，其謂語動詞可用單數(shù)形式(也可用復(fù)數(shù)。如：One and a half apples is (are) left on the table.

3、若英語是書名、片名、格言、劇名、報名、國名等的復(fù)數(shù)形式，其謂語動詞通常用單數(shù)形式。如： “The Arabian Nights”is an interesting story-book.

2、表示“時間、重量、長度、價值”等的名詞的復(fù)數(shù)作主語時，謂語動詞通常用單數(shù)形式， 這是由于作主語的名詞在概念上是一個整體，如：Thirty minutes is enough for the work.

1、what, who, which, any, more, all等代詞可以是單數(shù)，也可是復(fù)數(shù)，主要靠意思來決定。如：Which is your bag? / Which are your bags? / All is going well. / All have gone to Beijing.

8、在倒裝句中，謂語動詞的數(shù)應(yīng)與其后的主語一致。如：There comes the bus./ On the wall are many pictures. / Such is the result. / Such are the facts.

(二)邏輯意義一致原則：邏輯意義一致就是謂語動詞的數(shù)必須和主語的意義一致(因有時主語形式為單數(shù)，但意義為復(fù)數(shù)；有時形式為復(fù)數(shù)，但意義為單數(shù))。

7、由“a lot of, lots of, plenty of, the rest of, the majority of + 名詞”構(gòu)成的短語以及由“分?jǐn)?shù)或百分?jǐn)?shù)+名詞”構(gòu)成的短語作主語，其謂語動詞的數(shù)要根據(jù)短語中后面名詞的數(shù)而定。如：There are a lot of people in the classroom. / The rest of the lecture is wonderful. / 50% of the students in our class are girls.

注意： a number of“許多”，作定語修飾復(fù)數(shù)名詞，謂語用復(fù)數(shù)；the number of“…的數(shù)量”，主語是number，謂語用單數(shù)。

6、如果集體名詞指的是整個集體，它的謂語動詞用單數(shù)；如果它指集體的成員，其謂語動詞就用復(fù)數(shù)形式。這些詞有family, class, crowd, committee, population, audience等。如：Class Four is on the third floor. / Class Four are unable to agree upon a monitor.

注意：people, police, cattle等名詞一般都用作復(fù)數(shù)。如：The police are looking for the lost child.