Identifying and Correcting Grammatical Errors

Let's analyze the given sentence to identify the grammatical error: "Great many students who are good at other subjects perform poorly in English." We need to examine each segment provided in the options.

Analyzing the Sentence Segments

The sentence consists of several parts:

• The subject phrase: "Great many students"
• A relative clause modifying "students": "who are good at other subjects"
• The verb phrase: "perform poorly"
• The prepositional phrase indicating the area: "in English"

We will look at each option to see if it contains an error.

Examining Option 1: Great many students

The phrase is "Great many students". In standard English, when we use "great many" to mean "a large number", it is an idiomatic expression that requires the indefinite article 'a' before 'great'. The correct phrase is "A great many". Therefore, the segment "Great many students" contains a grammatical error because the article 'a' is missing.

Examining Option 2: in English

The phrase "in English" is a prepositional phrase indicating the subject area where the students perform poorly. This usage is grammatically correct.

Examining Option 3: who are good at

The phrase "who are good at" is part of the relative clause "who are good at other subjects". This clause correctly modifies "students" (people, hence 'who') and uses the correct idiom "good at" followed by the subject "other subjects". This segment is grammatically correct.

Examining Option 4: perform poorly

The phrase "perform poorly" describes how the students perform in English. "Perform" is the verb, and "poorly" is an adverb modifying the verb, indicating the manner of performance. This structure is grammatically correct.

Identifying the Grammatical Error

Based on the analysis, the segment containing the grammatical error is "Great many students" due to the missing article 'a'.

The Corrected Sentence

The grammatically correct sentence should be: "A great many students who are good at other subjects perform poorly in English."

Revision Table: Common Determiner Errors

Additional Information: Quantifiers with Countable Nouns

Quantifiers are words or phrases that are used before nouns to indicate the amount or quantity. With plural countable nouns like "students", we use various quantifiers. Understanding these can help identify similar grammar errors.

• Many: Used with plural countable nouns (e.g., many books, many students).
• A lot of / Lots of: Can be used with both plural countable and uncountable nouns (e.g., a lot of students, a lot of water).
• Several: Used with plural countable nouns (e.g., several ideas, several students).
• A large number of: Similar in meaning to "a great many", used with plural countable nouns (e.g., a large number of people, a large number of students).
• Few / A few: Used with plural countable nouns. "Few" means not many (negative sense), "a few" means some (positive sense) (e.g., few opportunities, a few friends).

The phrase "a great many" is a specific idiom that functions like "a large number of" and is used exclusively with plural countable nouns, always requiring the article 'a' at the beginning.