Analyzing the Sentence for Grammar Errors

We need to carefully examine each underlined part of the sentence to identify any grammatical errors. The sentence is: "Whenever the sky is clear, you can see the stars in the night."

Examining Part (a): "Whenever the sky is"

This part of the sentence acts as a dependent clause setting a condition. The structure "Whenever + subject + verb" is grammatically correct for introducing a conditional or temporal clause. "The sky is clear" is also a standard and correct phrase. There appears to be no grammatical error in part (a).

Examining Part (b): "clear, you can see"

This part smoothly transitions from the dependent clause to the main clause. The comma after "clear" is correctly used to separate the introductory dependent clause from the main clause. "You can see" is also grammatically correct, using the modal verb "can" to indicate ability or possibility. There appears to be no grammatical error in part (b).

Examining Part (c): "the stars in the night."

This part specifies what is seen and when. The phrase "the stars" is correct as it refers to stars generally visible in the sky. However, the phrase "in the night" is often not the standard idiom used to refer to the general period between evening and morning when stars are visible. The common and idiomatic expression is "at night".

While "in the night" can sometimes be used to refer to a specific event that happened during a particular night or at some point within the night, the context here ("Whenever the sky is clear, you can see...") implies a general condition and a general time frame when stars are visible. Therefore, "at night" is the appropriate phrase.

Consider the difference:

• At night: Refers to the general period of darkness between one day and the next (e.g., "It gets cold at night," "We often watch movies at night").
• In the night: Can refer to a specific moment or period within a single night (e.g., "He woke up suddenly in the night," "The phone rang sometime in the night"). It can also refer to a specific night when "the" is used, implying a known or particular night.

In the given sentence, the meaning is about the general occurrence of seeing stars during any clear period of darkness. Thus, "at night" is the correct idiomatic phrase. The use of "in the night" is unidiomatic in this general context and constitutes a grammatical error.

Conclusion on the Error

Based on the analysis, the error lies in part (c) due to the unidiomatic use of "in the night" instead of the standard phrase "at night" for the general time reference.

Identifying the Correct Option

Since the error is found in part (c), the correct option indicating the error is C.

Revision Table: Key Grammar Points

Additional Information: Prepositions of Time

Understanding prepositions of time like "at", "in", and "on" is crucial for identifying errors in sentences related to time references. While "in" is used for longer periods like months, seasons, and years, and "on" for specific days and dates, "at" is typically used for specific points in time (like "at 3 o'clock", "at midnight", "at noon") and for the general phrase "at night".

Here are some common uses of "at" for time:

• Specific clock times: at 9 AM, at 5:30 PM
• Meal times: at breakfast, at lunch, at dinner
• Specific points in time/holiday periods: at midnight, at noon, at sunrise, at sunset, at dawn, at dusk, at the weekend (British English), at Christmas, at Easter, at Thanksgiving
• The idiomatic phrase: at night

Mastering these idiomatic uses of prepositions can greatly help in sentence error identification questions.