修饰，谓语动词的单复数与表示计量单位的名词一致。

　　His trousers are too long to wear.

　　This pair of glasses was found in the bag.

　　语法填空解题"3视角"

　　1．看主语人称，确定谓语动词形式

　　2．看充当主语的词(短语)，确定谓语动词形式

　　(1)看到主语为动名词短语/to do不定式或从句，要想到谓语应为第三人称单数形式；

　　(2)看到"分数/百分数＋of＋名词"作主语，要想到谓语的数取决于名词。

　　3．看到there be等结构，要想到用就近一致原则

　　据第1条解题

　　1．The design on the back shows (show) the yellow­eyed penguin, one of the world's rarest penguins.

　　2．Having traveled from China through Kazakhstan, Russia, Belarus, Poland, Germany, Belgium and France for 18 days, the train finally arrived in London.Inside the 68 containers were (be) household goods, clothing, cloth, bags and suitcases.

　　据第2条解题

　　3．Two­fifths of the land in that district _is_covered (cover) with trees now, about 80% of which were_planted_ (plant) in the 1990s.

　　4．Listening to loud music at rock concerts has_caused (cause) hearing loss in some teenagers over the years.

　　据第3条解题

　　5．Not only Jasper but also his friends are (be) planning to go, because they have never been there before.

　　6．There are_ (be) also many small universities with only a few hundred students.

　　短文改错解题"3原则"

　　1．通过"语法一致"原则解决主谓一致问题

　　(1)可数名词单数或不可数名词作主语时谓语动词用单数；可数名词复数作主语时谓语动词用复数。

　　(2)在定语从句中，关系代词that, who, which等作主语时，其谓语动词的数应与句中先行词的数一致。

(3)单个的动名词、名词性从句作主语，谓语动词一般用单数。但what引导的主语从句表示复数概念时，谓语动词用复数。