基本上，主词搭配动词的概念是以下列两个原则为主：需要加拿大代写？
1.单数主词搭配单数动词：
Chen rides his scooter to work every day.
2.复数主词搭配复数动词：
The students are climbing the walls like caged animals.
主词与动词的搭配原则看似十分容易，却也是作者最容易疏忽和犯错的地方。我们在编修论文时，最常修正的错误之一就是主词与动词的搭配。是什么原因让主词与动词的搭配变得这么困难？
其中一个原因是，当作者遇到又长又复杂的主词时，可能会被搞得昏头转向，而容易忘记哪一个名词才是整个主词片语的中心词，于是不小心将动词搭配给最靠近的名词，范例如下：
The arrival of new fall fashions have excited all the back-to-school shoppers.
此句的中心词应为arrival，而非fashions，因此应将句子改为：
The arrival of new fall fashions has excited all the back-to-school shoppers.
另一个写作陷阱是不使用标准的文法搭配规则，而是按照作者的意念来决定搭配方式，也就是不论真正的主词为单数或复数，动词搭配的是作者意念中的那一个主词。
Twenty-five rules is a lot to digest.
在此范例中，「25条规则」被视为一个整体的单数的主词，因此后面接单数动词is。
Twenty-five rules are listed on the notice.
这「25条规则」全部被列在公告中，25条规则在这里当复数主词，后面接复数动词are。
以下列出10种主词与动词的搭配规则，供大家写作时参考：
1. 除非主词的原意是单数，否则如果主词当中的数个名词是以and衔接，一律将主词视为复数。
She and I run every day.（她和我，复数主词衔接复数动词）
Peanut butter and jelly is my favorite sandwich.（主词的原意是单数，衔接单数动词）
2. 如果主词当中的数个名词是以or衔接，动词一律根据最后一个名词做变化。
She or I run every day.
Potatoes, pasta, or rice pairs well with grilled chicken.
3. 集合名词（例如team、couple、staff）可搭配单数或复数动词，端看作者欲强调主词的个别性或整体性。
The baseball team is practicing night and day for the final game.
The entire staff has done a great job this year.
4. 连接词（例如combined with、coupled with、accompanied by、added to、along with、together with、as well as）不会改变主词的单复数特性，这些连接词通常会使用逗号隔开。
Oil, as well as gas, is a popular heating choice.
Peanut butter combined with bread and jelly is a tasty snack. （这里的peanut butter、bread、jelly是一个整体，指的是一整个三明治，因此不需要使用逗号隔开，动词依然是单数。）
5. 集合名词的片语（例如a bunch of、a group of、a set of）可搭配单数或复数动词，端看作者欲强调主词的个别性或整体性：
A group of boys were digging in my flower beds!
A set of 12 dishes is all you need for the dinner party.
6. Each搭配单数动词。
Each boy is excited about the meet; each is well prepared.
7. None若指单数名词，则搭配单数动词；若指复数名词，则搭配复数动词。
None of the peas are left on Sean's plate.
None of the book is reproducible without permission.
8. 碰到分数时，动词是搭配名词全体。
One-fourth of the books are gone.
One-fourth of the sand is white.
9. 碰到金额时，具体数字使用单数动词，不具体数字则用复数名词。
Within a year, $5 million was spent on building a new factory, and millions more were spent on training future factory workers.
10. 片语more than one搭配单数动词（这确实听起来不合逻辑，但切记：无论one后方是否出现承接的名词，one后方一定接著名词）
More than one box is sitting in the hallway.
More than one is sitting in the hallway.
