主语为主语为Or

主语和谓语的一致性其中一点表现在逻辑意义上也必须有意义。我们看看下面这个错误的句子：The development of a hydrogen car based on expected performance parameters will be able to travel hundreds of miles without refueling.

乍一看，这句话似乎还好。但请注意句意：The development of a hydrogen car... will be able to travel... ?这不是development，将will be able to travel。原句想表达的合理意思应该是氢汽车本身will be able to travel.

正确的写法应该是这样的：Once developed, a hydrogen CAR based on expected performance parameters WILL BE able to travel hundreds of miles without refueling.

请一定注意在读句子的时候，将主语和谓语首先揪出来，看看主谓在逻辑意思上是否匹配。

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AND能联结两个或两个以上部分，形成复合主语。

l  Joe AND his friends ARE going to the beach.

l  Mathematics, history, AND science ARE mandatory high-school subjects.

请注意，这种复合主语的谓语动词用复数采取复数形式。其他许多单词和短语也都有and的功能。例如：

along with Polly / accompanied by me / in addition to surgery / together with a tie / as well as the mayor / including salt and pepper

这种类似的词也是句子中可删除的成分。这种类似的词和And有时并不同，因为他们在句子中并无实际成分仅做修饰，并不能影响主语的数量。

l  Joe, as well as his friends, IS going to the beach.

l  Mathematics, in addition to history and science, IS a required subject.

但是如果是AND的话就会改变句子的主语变为复数，所以请记住，类似于AND的添加词并不改变句子的单复数。