Understanding Prepositions for Time

The question asks us to select the most appropriate option to replace the underlined segment "towards" in the sentence, "We will leave towards 6.00 a.m." The underlined segment "towards" indicates direction, but in this sentence, we need to specify the exact time of departure. Therefore, a preposition indicating a specific point in time is required.

Analyzing the Options for Sentence Correction

Let's examine each option provided:

• at: This preposition is used to indicate a specific point in time, such as "at 3 o'clock," "at noon," "at midnight," or "at 6.00 a.m." It is also used for specific locations.
• on: This preposition is typically used for days of the week (e.g., "on Monday," "on Sunday") or specific dates (e.g., "on December 5th," "on Christmas Day"). It is not used for specific times of the day like "6.00 a.m."
• for: This preposition is used to indicate duration (e.g., "for two hours") or purpose (e.g., "work for money"). It is not used to state the specific time at which an action will occur.
• from: This preposition indicates a starting point in time or place (e.g., "from 9 a.m. to 5 p.m.," "from London to Paris"). While it indicates a start, it doesn't precisely indicate the singular point in time of departure in the same way 'at' does for a specific hour.

Selecting the Correct Preposition

The original sentence requires a preposition that indicates the exact time of leaving, which is 6.00 a.m. Based on our analysis of the options, the preposition "at" is the correct choice for specifying a precise time like "6.00 a.m."

Substituting "towards" with "at" gives us the corrected sentence:

We will leave at 6.00 a.m.

This sentence correctly uses the preposition "at" to indicate the specific time of departure.

Revision Table: Common Prepositions of Time

Additional Information on Prepositions

Prepositions are words that link a noun, pronoun, or phrase to other words in a sentence. They often indicate relationships of location, time, direction, or possession. Choosing the correct preposition is crucial for clarity and grammatical correctness in English.

Prepositions of time help us specify when an event happens. While 'at' is used for precise times, 'on' for days/dates, and 'in' for longer periods, there are many other prepositions of time (e.g., 'before', 'after', 'during', 'until', 'since').

In the given sentence, the phrase "6.00 a.m." clearly refers to a specific hour and minute, making "at" the definitive choice according to standard English grammar rules for prepositions of time.