His trousers are new. 他的裤子是新的。
但带有pair这样的量词时，谓语要与量词的数保持一致。如：
That pair of trousers was sold out. 那条裤子卖出去了。
■“分数（百分数）+ of + 名词”以及 “all (most, some, any, half, a lot, part, the rest) + of + 名词”做主语时，谓语动词的数与of后的名词的数一致。如：
Three-fourths of the surface of the earth is water. 地表四分之三都是水。
Twenty percent of the oranges are bad. 这桔子百分之二十都坏了。
All of my classmates like music. 我们所有的同学都喜欢音乐。
All of the water is gone. 那些水全都没有了。
The rest of the students have gone home. 其余的学生都回家了。
The rest of the money was stolen. 其作的钱被人偷了。
■“a (the, this, that) kind /sort / type of + 名词”做主语，谓语用单数形式；但“these (those, all, many, some) kinds of + 名词”做主语，谓语则用复数形式。如：
This kind of book is useful for us. 这种书对我们很用。
Many kinds of shoes are on sale in that shop. 那个店里有许多种鞋出售。
注：“名词+ of a (the, this, that, these, those, all, some, many等) + kind(s) ”做主语，谓语动词的数与前面名词的数一致。如：
Book of this kind is useful for us. 这种书对我们有用。
Apples of these kinds are sour. 这种苹果是酸的。
■在主谓倒装的句子中，谓语动词的数应与其后的主语一致。如：
On the wall hang two large portraits. 墙上挂着两幅大肖像。
Between the two rows of trees stands the teaching building. 要两排树之间是教学楼。
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