Model Answer
0 min readIntroduction
The question assesses a fundamental aspect of English grammar: the correct application of verb tenses. Understanding how verbs change based on time and frequency is crucial for clear and effective communication. The sentence provided requires the correct form of the verb 'examine' to convey the meaning that the doctor regularly checks patients each evening. This demonstrates a habitual action occurring in the present.
The correct sentence is: The doctor examines the patients every evening.
Explanation
The original sentence used 'examine' incorrectly. The phrase "every evening" indicates a habitual action, a routine that happens regularly. For habitual actions in the present, we use the simple present tense, not the present continuous tense ('is examining').
Simple Present vs. Present Continuous
- Simple Present: Used for habits, general truths, and facts. Structure: Subject + Base form of verb (or Subject + s/es if the subject is third-person singular – he/she/it).
- Present Continuous: Used for actions happening *now*, temporary actions, or actions that are in progress. Structure: Subject + is/am/are + -ing form of verb.
In this case, the doctor's examination of patients is a regular occurrence, a habit. Therefore, the simple present tense is appropriate.
Subject-Verb Agreement
The subject of the sentence is "the doctor," which is a third-person singular noun. Therefore, the verb must agree with the subject and take the 's' ending, becoming 'examines'.
Incorrect Usage and Why
Using "The doctor is examining the patients every evening" would imply that the doctor is *currently* examining patients every evening, which is not the intended meaning. It suggests an action happening at this very moment, repeated every evening, which is less natural and grammatically less precise.
Alternative Correct Sentence
While "The doctor examines the patients every evening" is the most natural and concise answer, "The doctor usually examines the patients every evening" is also grammatically correct and adds a slight nuance of frequency.
Conclusion
In conclusion, the correct sentence is "The doctor examines the patients every evening." This demonstrates a clear understanding of the simple present tense and its application to habitual actions. Correct verb tense usage is fundamental to effective communication, and this example highlights the importance of considering the context and frequency of an action when choosing the appropriate tense.
Answer Length
This is a comprehensive model answer for learning purposes and may exceed the word limit. In the exam, always adhere to the prescribed word count.