Preposition Selection for Time Expressions

The question asks us to find the most suitable preposition to fill the blank in the sentence: "I don't like working ______ night." This requires understanding the correct usage of prepositions, specifically 'in', 'at', and 'on', when referring to times of the day.

Understanding Prepositions of Time

Prepositions are words that link nouns, pronouns, and phrases to other words in a sentence. When talking about time, specific prepositions are used depending on whether we are referring to a specific point in time, a day, a month, or a part of the day.

Analyzing Prepositional Choices with 'Night'

Let's examine how each option fits with the word 'night' in the given context:

• 'in': The preposition 'in' is generally used for longer periods like months (e.g., in July), years (e.g., in 2023), seasons (e.g., in winter), and sometimes parts of the day like morning, afternoon, and evening (e.g., in the morning, in the afternoon, in the evening). While "in the night" can sometimes be used, it often refers to something specific that occurred during a particular night, rather than the general time period. For the general statement "I don't like working ______ night," 'in' is less common and idiomatic compared to another option.
• 'at': The preposition 'at' is commonly used to specify clock times (e.g., at 9 PM), meal times (e.g., at lunchtime), and specific points or periods in the day. Crucially, 'at' is the standard idiomatic preposition used for the general period of 'night'. Phrases like "at night" are very common in English. For example, "Stars are visible at night."
• 'on': The preposition 'on' is typically reserved for specific days of the week (e.g., on Saturday) or dates (e.g., on the 5th of May). It is not used with parts of the day like morning, afternoon, evening, or night in this general sense.
• 'into': The preposition 'into' usually implies movement or transition from one state or place to another (e.g., "He walked into the room," "The caterpillar changed into a butterfly"). It does not fit the context of working during a period of time.

Determining the Most Appropriate Preposition

Comparing the options, 'at' is the standard and most natural-sounding preposition to use when talking about the general time period of night. The phrase "working at night" correctly conveys the meaning of performing work during the nighttime hours.

Therefore, the most appropriate preposition to complete the sentence "I don't like working ______ night" is 'at'.