Final answer:
The incorrect idiom in the provided sentences is 'on mistake,' which should be 'by mistake.' Attention to prepositional idioms is crucial as they present particular meaning when combined. Therefore, the correct option is d) ""Perhaps she did it on mistake.""
Step-by-step explanation:
The sentence that uses a prepositional idiom incorrectly is "Perhaps she did it on mistake." The correct idiom is "by mistake," which indicates that something was done unintentionally. Prepositional idioms are fixed phrases where the preposition combined with another word has a specific meaning that cannot be deduced by the individual meanings of the words.
Additionally, to help clarify common grammatical errors related to the use of commas, apostrophes, verbs, and hyphens as per the review questions:
- To address comma usage: Commas often require careful placement to clarify the meaning of a sentence and to separate clauses and list items.
- Apostrophes are used to show possession or to form contractions and require precise placement to convey the correct meaning.
- Verb agreement is essential for grammatical correctness; the verb must agree in number with its subject.
- Hyphen usage can affect the readability of phrases by linking words that function together as a single concept or by separating compound modifiers.