The sentence provided is: "Each of the students have submitted their assignments on time." The objective is to identify the part containing a grammatical error. Let's analyze the sentence:
1. Each of the students: Here, 'Each' is a singular pronoun. When it is followed by a prepositional phrase like 'of the students', the verb should agree with the singular pronoun 'Each'.
2. have submitted: The error lies here. The verb 'have' is plural, but it should be singular to match the singular subject 'Each'. Therefore, it should be 'has submitted'.
3. their assignments: This phrase is correct because 'their' refers to 'students', which is plural in the context of assignment ownership.
4. on time: This is a correctly used adverbial phrase modifying when the action of submitting occurred.
The correct form of the sentence should be: "Each of the students has submitted their assignments on time."
Step 1: Subject-verb agreement
“Each” is singular, so the verb should be singular: “has submitted”.
Step 2: Analyze pronoun
Though “their” is plural, it is often used for singular indefinite pronouns in modern English for gender neutrality.
Step 3: Error is in verb “have submitted”
It should be “has submitted”.