错误：It was both a long ceremony and very tedious.
正确：The ceremony was both long and tedious.
解释：在正确用法中，很明显， “ceremony” 是所描述的主语。而在错误用法中，主语是 “it” 还是“ceremony” 呢？主语模糊不清，使得该句语法有误。
以下是另一个例子，请注意平行结构中 “for” 的使用。
错误：A time not for words, but action.
正确：A time not for words, but for action.
以下是另一个例子，请注意平行结构中 “that” 的使用。
错误：My objections are, first, the injustice of the measure; second, that it is unconstitutional.
正确：My objections are, first, that the measure is unjust; second, that it is unconstitutional.
解释：在错误用法中，读者不清楚代名词 “it” 指的是什么。 而在正确用法中， “that the measure is”和 “that it is” 组成了平行结构，读者很容易明白代名词 “it” 指的就是“衡量标准”。
Uni-edit English Writing Tip: Parallel structures Part C — both, and; not, but; not only, but also; either, or; first, second, third etc.
Level of difficulty: Intermediate
This is the third part in a five part series about using parallel structures. This part focuses on the use of commonly found words in parallel structures.
While editing English manuscripts, Uni-edit editors often need to correct sentences for correct usage of parallel structures. Correct use of parallel structures makes the writing easier to read and easier to understand for native-speakers of English and for non-native speakers of English.
For sentences that use these commonly found words, parallel structures are required to ensure clarity. Many violations of this rule can be corrected by rearranging the sentence.
Incorrect: It was both a long ceremony and very tedious.
English corrected: The ceremony was both long and tedious.
Explanation: In the correct sentence, 'ceremony' is clearly the subject that is being described. In the incorrect sentence, is the subject 'it' or 'ceremony'? The subject is not clear, which makes the sentence grammatically incorrect.
Another example is below. Pay attention to the use of 'for' in the parallel structure.
Incorrect: It is a time not for words, but action.
English corrected: It is a time not for words, but for action.
Another example is below. Pay attention to the use of 'that' in the parallel structure.
Incorrect: My objections are, first, the injustice of the measure; second, that it is unconstitutional.
English corrected: My objections are, first, that the measure is unjust; second, that it is unconstitutional.
END OF TIP