您可能犯下动词形态上的错误。在一个句子中，动词表达动作(jump, show) 或主词的状态(are, was)。 以下是一些建议，让您能更有效地使用动词：
1. 助动词 (亦称附属动词) 位在主动词前。以下所有的动词皆可为助动词：
be, am, is, are, was, were, being, been, has, have, had, do, does, did, can, will, shall, should, could, would, may, might, and must.
以下是有使用助动词的句子的例子：
be, am, is, are, was, were, being, been, has, have, had, do, does, did, can, will, shall, should, could, would, may, might, and must.
以下是有使用助动词的句子的例子：
Many people don't know what they are going to do after college.
I am going to give you step-by-step instructions.
I am going to give you step-by-step instructions.
2. 情态助动词。
诸如 might, must, can, would, 及 should 等字也被称为情态助动词。它们表达广泛的意义 （能力，许可, 可能性, 必要性等等)
以下是使用情态助动词方式的其中一个例子：
Tom might have gone to the party if he had been invited.
If I had a million dollars, I would buy a house for my parents.
If I had a million dollars, I would buy a house for my parents.
此情态助动词用法被称为先决条件性用法。一个事件需要靠另一个事件才能发生。在第一个例子里， Tom 需要先被邀请才能参加派对。在第二个例子里，我需要有百万财富才能替我的父母买房子。
3. 不定词的形成方式就是在动词的原始形态前方加 “to” 。 例如
He is too tired to go to the barbecue.
The manager wants to hire a new secretary.
不定词也可以被用作一个句子的主词或受词。例如
To invest now seems risky.
The teacher told him to leave.
The teacher told him to leave.
在第一个例子里， To invest 是句子的主词，而在第二个例子里，to leave 是句子的受词。
我们可以使用不定词来显示一个动作与主动词的动作同时发生或之后发生。
We like to play video games.
My best friend wants to shop at that mall.
My best friend wants to shop at that mall.
在第一个例子中, like 与play 同时发生。在第二个例子中， want 与 shop 同时发生。
4. 在助动词之後不可使用of 。
在有些动词的词句中，将有两个或多个动词被使用(should have happened, might be eaten, could have decided)。以下是一些使用”of” 的例子:
不正确: They would of stayed one more month if possible.
不正确: In that time, he could of finished the project.
正确: They would have stayed one more month if possible.
正确: In that time, he could have finished the project.
不正确: In that time, he could of finished the project.
正确: They would have stayed one more month if possible.
正确: In that time, he could have finished the project.
"Of"是一个介系词，而不是动词。因此，在这些使用"of" 的句子都应该用助动词"have"取代。
以下的句子显示错误的动词用法及它们正确的用法。
不正确: Mary should studies harder.
不正确: The librarian is helping a student to finds a book.
正确: Mary should study harder.
正确: The librarian is helping a student to find a book.
不正确: The librarian is helping a student to finds a book.
正确: Mary should study harder.
正确: The librarian is helping a student to find a book.
总结:动词是一个句子中非常重要的部分。有些基本规则可以让您更有效地使用动词。若您不了解在您的文章中被标示为动词上的错误，您可以跟您的指导教师请教。使用图尼丁，进行论文查重，图尼丁系统基于：Turnitin CrossCheck ' Thenticate,适用于：毕业论文、留学生Essay、外文投稿，免费赠送检测码以及语法报告，并支持开设电子发票。
