The following list contains only brief examples and explanations intended for you to use as reminders while you are editing your papers. To learn more:
- Take a free grammar or punctuation review class offered by the Writing Center.
- Set up an appointment for an individual conference in the Writing Center.
- Confer with your course instructor.
- Look at the grammar and punctuation materials on the Writing Center’s Web site.
- Consult a handbook for additional examples and compete explanations.
Sentence Fragments. Make sure each word group you have punctuated as a sentence contains a grammatically complete and independent thought that can stand alone as an acceptable sentence.
Incorrect: | Tests of the Shroud of Turin have produced some curious findings. For example, the pollen of forty-eight plants native to Europe and the Middle East. |
Revised: | Tests of the Shroud of Turin have produced some curious findings. For example, the cloth contains the pollen of forty-eight plants native to Europe and the Middle East. |
Incorrect: | Scientists report no human deaths due to excessive caffeine consumption. Although caffeine does cause convulsions and death in certain animals. |
Revised: | Scientists report no human deaths due to excessive caffeine consumption, although caffeine does cause convulsions and death in certain animals. |
Sentence Sprawl. Too many equally weighted phrases and clauses produce tiresome sentences.
Incorrect: | The hearing was planned for Monday, December 2, but not all of the witnesses could be available, so it was rescheduled for the following Friday. [There are no grammatical errors here, but the sprawling sentence does not communicate clearly and concisely.] |
Revised: | The hearing, which had been planned for Monday, December 2, was rescheduled for the following so that all witnesses would be able to attend. |
Misplaced and Dangling Modifiers. Place modifiers near the words they describe; be sure the modified words actually appear in the sentence.
Incorrect: | When writing a proposal, an original task is set for research [Who is writing a proposal?] |
Revised: | When writing a proposal, a scholar sets an original task for research. |
Incorrect: | Many tourists visit Arlington National Cemetery, where veterans and military personnel are buried every day from 9:00 a.m. until 5:00 p.m. |
Revised: | Every day from 9:00 a.m. until 5:00 p.m., many tourists visit Arlington National Cemetery, where veterans and military personnel are buried. |
Faulty Parallelism. Be sure you use grammatically equal sentence elements to express two or more matching ideas or items in a series.
Incorrect: | The candidate’s goals include winning the election, a health program, and education. |
Revised: | The candidate’s goals include winning the election, enacting a national health program, and improving the educational system. |
Incorrect: | Some critics are not so much opposed to capital punishment as postponing it for so long. |
Revised: | Some critics are not so much opposed to sentencing convicts to capital punishment as they are to postponing executions for so long. |
Unclear Pronoun Reference. Pronouns must clearly refer to definite referents [nouns]. Use it, they, that, these, those, and which carefully to prevent confusion.
Incorrect: | Einstein was a brilliant mathematician. This is how he was able to explain the workings of the universe. |
Revised: | Einstein, who was a brilliant mathematician, used his quantitative ability to explain the workings of universe. |
Incorrect: | Because Senator Martin is less interested in the environment than in economic development, she sometimes neglects it. |
Revised: | Because of her interest in economic development, Senator Martin sometimes neglects the environment. |
Pronoun Agreement. Be sure that each pronoun agrees in number (singular or plural) with the noun to which it refers (its antecedent or referent).
Incorrect: | When a candidate runs for office, they must expect to have their personal life scrutinized. |
Revised: | When candidates run for office, they must expect to have their personal lives scrutinized. |
Incorrect: | According to tenets of the “new urbanism,” everyone needs to consider the relationship of their house to the surrounding community. |
Revised: | According to tenets of the “new urbanism,” everyone needs to consider the relationship of his or her house to the surrounding community. |
Incorrect Pronoun Case. Determine whether the pronoun is being used as a subject, object, or possessive in the sentence, and select the pronoun form to match.
Incorrect: | Castro’s communist principles inevitably led to an ideological conflict between he and President Kennedy. |
Revised: | Castro’s communist principles inevitably led to an ideological conflict between him and President Kennedy. |
Incorrect: | Because strict constructionists recommend fidelity to the Constitution as written, no one objects more than them to judicial reinterpretation. |
Revised: | Because strict constructionists recommend fidelity to the Constitution as written, no one objects more than they [object] to judicial reinterpretation. |
Omitted Commas. Use commas to signal nonrestrictive or nonessential material to prevent confusion, and to indicate relationships among ideas and sentence parts.
Incorrect: | When it comes to eating people differ in their tastes. |
Revised: | When it comes to eating, people differ in their tastes. |
Incorrect: | The Huns who were Mongolian invaded Gaul in 451. |
Revised: | The Huns, who were Mongolian, invaded Gaul in 451. [“Who were Mongolian” adds information but does not change the core meaning of the sentence because Huns were a Mongolian people; it is therefore nonrestrictive or nonessential and should be set apart with commas.] |
Superfluous Commas. Unnecessary commas make sentences difficult to read.
Incorrect: | Field trips are required, in several courses, such as, botany and geology. |
Revised: | Field trips are required in several courses, such as botany and geology. |
Incorrect: | The term “scientific illiteracy,” has become almost a cliché in educational circles. |
Revised: | The term “scientific illiteracy” has become almost a cliché in educational circles. |
Comma Splice. Do not link two independent clauses with a comma (unless you also use a coordinating conjunction and, or, but, for, nor, so yet). Instead use a period or semicolon, or rewrite the sentence.
Incorrect: | In 1952 Japan’s gross national product was one third that of France, by the late 1970s it was larger than the GNPs of France and Britain combined. |
Revised: | In 1952 Japan’s gross national product was one third that of France. By the late 1970s it was larger than the GNPs of France and Britain combined. |
Incorrect: | Diseased coronary arteries are often surgically bypassed, however half of bypass grafts fail within ten years. |
Revised: | Diseased coronary arteries are often surgically bypassed; however, half of bypass grafts fail within ten years. |
Apostrophe Errors. Apostrophes indicate possessives and contractions but not plurals. Caution: its, your, their, and whose are possessives (but no apostrophes). It’s, you’re, they’re, and who’s are contractions.
Incorrect: | In the current conflict its uncertain who’s borders their contesting. |
Revised: | In the current conflict it is [it’s] uncertain whose borders they are [they’re] contesting. |
Incorrect: | The Aztecs ritual’s of renewal increased in frequency over the course of time. |
Revised: | The Aztecs’ rituals of renewal increased in frequency over the course of time. |
Words Easily Confused. Effect is most often a noun (the effect) and affect is most often a verb. Other pairs commonly confused: lead/led and accept/except. Check a glossary of usage to find the right choice.
Incorrect: | The recession had a negative affect on sales. |
Revised: | The recession had a negative effect on sales. (or) The recession affected sales negatively. |
Incorrect: | The laboratory instructor choose not to offer detailed advise. |
Revised: | The laboratory instructor chose not to offer detailed advice. |