Our teacher __________ (check) more than a dozen exam papers up to now...
Correct Answer : has checked
Explanation : In this sentence, present perfect tense will be used; so Our teacher has checked more than a dozen exam papers up to now.
View all questions of this test
Our teacher __________ (check) more than a dozen exam papers up to now...
Explanation:
Present Perfect Tense:
The correct answer is "has checked" because the sentence is in the present perfect tense. The present perfect tense is used to describe an action that started in the past and has a connection to the present. It is formed by using the auxiliary verb "has" (for singular subjects) or "have" (for plural subjects) followed by the past participle of the main verb.
Use of "has checked":
In the given sentence, the action of checking the exam papers started in the past and continues up to the present. The word "up to now" indicates that the action is still ongoing. Therefore, we use the present perfect tense to describe this action.
Subject-Verb Agreement:
The verb "check" needs to agree with the subject "teacher" in terms of number and person. Since the subject is singular, we use the singular form of the verb, which is "has checked."
Contrast with Simple Past Tense:
If the sentence were in the simple past tense, we would use the past tense form of the verb "check." For example, "Our teacher checked more than a dozen exam papers yesterday." This would indicate that the action of checking the papers occurred and was completed in the past, with no connection to the present.
Conclusion:
In summary, the correct answer is "has checked" because the sentence is in the present perfect tense and the verb needs to agree with the singular subject "teacher." The use of the present perfect tense indicates that the action of checking the exam papers started in the past and continues up to the present.