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Unskillful writers often violate this principle, from a mistaken belief that they should constantly vary the form of their expressions. It is true that in repeating a statement in order to emphasize it writers may have need to vary its form. But apart from this, writers should follow carefully the principle of parallel construction.
Faulty Parallelism
| Corrected Version
|
| Formerly, science was taught by the textbook method, while now the laboratory method is employed. | Formerly, science was taught by the textbook method; now it is taught by the laboratory method. |
The left-hand version gives the impression that the writer is undecided or timid; he seems unable or afraid to choose one form of expression and hold to it. The right-hand version shows that the writer has at least made his choice and abided by it.
By this principle, an article or a preposition applying to all the members of a series must either be used only before the first term or else be repeated before each term.
Faulty Parallelism |
Corrected Version |
| The French, the Italians, Spanish, and Portuguese | The French, the Italians, the Spanish, and the Portuguese |
| In spring, summer, or in winter | In spring, summer, or winter (In spring, in summer, or in winter) |
Correlative expressions (both, and; not, but; not only, but also; either, or; first, second, third; and the like) should be followed by the same grammatical construction. Many violations of this rule can be corrected by rearranging the sentence.
Faulty Parallelism |
Corrected Version |
| It was both a long ceremony and very tedious. | The ceremony was both long and tedious. |
| A time not for words, but action | A time not for words, but for action |
| Either you must grant his request or incur his ill will. | You must either grant his request or incur his ill will. |
| My objections are, first, the injustice of the measure; second, that it is unconstitutional. | My objections are, first, that the measure is unjust; second, that it is unconstitutional. |
When making comparisons, the things you compare should be couched in parallel structures whenever that is possible and appropriate.
Faulty Parallelism |
Corrected Version |
| My income is smaller than my wife. | My income is smaller than my wife's. |
1) Paola has wit, charm, and she has an extremely pleasant personality.
Paola has wit, charm, and a pleasing personality.
2) In English class, Tashonda learned to read poems critically and to appreciate good prose.
In English class, Tashonda learned to read poems critically and she appreciated good prose.
3) Raoul's QPA is higher than Ralph.
Raoul's QPA is higher than Ralph's.
4) He wanted three things out of college: to learn a skill, to make good friends, and to learn about life.
He wanted three things out of college: to learn a skill, to make good friends, and learning about life.
5) Coach Espinoza was a brilliant strategist, a caring mentor, and a wise friend.
Coach Espinoza was a brilliant strategist, a caring mentor, and friend.
6) We found the film repulsive, offensive, and we thought it was embarrassing.
We found the film repulsive, offensive, and embarrassing.
7) Mr. Nguyen kept his store clean, neat, and he made it conveniently arranged.
Mr. Nguyen kept his store clean, neat, and conveniently arranged.
8) Professor Ali rewarded his students for working hard on the final project and going beyond the call of duty.
Professor Ali rewarded his students for their hard work on the final project and going beyond the call of duty.
9) There's nothing I like better than finding a good trout stream, setting up camp, and spending a couple of days fishing.
There's nothing I like better than finding a good trout stream, setting up camp, and to spend a couple of days fishing.