Understanding the Tense Used in the Sentence

The question asks to identify the tense used in the underlined phrase "had mastered" within the sentence: "He joined the cooking school late but only in a few months had mastered the recipes." Let's analyze the structure of the underlined phrase to determine the correct verb tense.

Analyzing the Underlined Phrase "had mastered"

The underlined phrase is "had mastered". This phrase consists of:

• The auxiliary verb "had", which is the past tense form of "have".
• The main verb "mastered", which is the past participle form of "master".

This structure, had + past participle, is the defining characteristic of the Past Perfect tense.

What is the Past Perfect Tense?

The Past Perfect tense is used to talk about an action that was completed before another action or a specific point in the past. The general structure is:

Subject + had + Past Participle

In the given sentence, "He had mastered the recipes" indicates that the action of mastering the recipes was completed before some other point in the past (implied by the context of joining late, perhaps referring to before a specific event like graduation or a test). Identifying the correct tense used is crucial for understanding the sequence of events.

Evaluating the Options for Tense Used

Let's consider the given options and why "Past perfect tense" is the correct identification for the tense used:

• Past indefinite tense (Simple Past): The structure is Subject + simple past verb (e.g., He mastered). This tense describes a completed action in the past. While 'mastered' on its own is simple past, the phrase includes 'had', making it a different tense.
• Past perfect tense: The structure is Subject + had + past participle (e.g., He had mastered). This matches the underlined phrase exactly. This verb tense correctly describes an action completed before another point in the past.
• Present perfect tense: The structure is Subject + have/has + past participle (e.g., He has mastered). This tense is used for actions completed recently, actions that started in the past and continue, or actions with a result in the present. The auxiliary verb used is "had", not "have" or "has", so this tense is incorrect.
• Present indefinite tense (Simple Present): The structure is Subject + base verb (or base verb + -s/-es for third person singular) (e.g., He masters). This tense is used for habits, facts, or scheduled events. The sentence describes a past event, not a present habit or fact.

Based on this sentence analysis, the phrase "had mastered" clearly uses the structure of the Past Perfect tense. Understanding English grammar rules helps in correctly identifying the tense used.

Therefore, the correct answer for the tense used in the underlined phrase "had mastered" is Past perfect tense. This demonstrates the application of standard English grammar for proper sentence analysis.