The students understand the lesson very well. The lesson _______ by th...
Explanation:
The correct answer is option 'c' - "is understood".
Subject-Verb Agreement:
In the given sentence, the subject is "The lesson" and the verb is "understood". Both the subject and the verb are in the singular form. Therefore, we need to use the singular form of the verb "is" to maintain subject-verb agreement.
Present Tense:
The verb "is understood" is in the present tense. In the given sentence, the students currently understand the lesson very well. Therefore, we need to use the present tense to describe the understanding of the lesson.
Passive Voice:
The verb "is understood" is in the passive voice. In the given sentence, the focus is on the action of understanding, rather than on who is doing the action. The lesson is being understood by the students, so the passive voice is used to emphasize this.
Choice of "is understood":
Option 'c' - "is understood" is the correct choice because it follows subject-verb agreement, present tense, and passive voice. The verb "is understood" accurately conveys that the lesson is currently being understood by the students.
Incorrect Choices:
Option 'a' - "are understood" is incorrect because it uses the plural form of the verb "are", which does not agree with the singular subject "The lesson".
Option 'b' - "was understood" is incorrect because it uses the past tense form of the verb "was", which does not accurately represent the present understanding of the lesson.
Option 'd' - "were understood" is incorrect because it uses the past tense form of the verb "were", which does not agree with the singular subject "The lesson".
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