Which of the following sentences demonstrate correct subject verb agreement?

The visited their grandparents last weekend

The children visited their grandparents last weekend

They visited their grandparents last weekend

The children visit their grandparents last weekend

The children visited their grandparents last weekend

They visited their grandparents last weekend

The correct sentence that demonstrates subject verb agreement is:

The children visited their grandparents last weekend.

To determine the correct subject-verb agreement in these sentences, we need to ensure that the subject (the doer of the action) and the verb (the action itself) are in agreement in terms of singular or plural form.

1. "The visited their grandparents last weekend." This sentence does not exhibit subject-verb agreement because the subject "The" is singular, but the verb "visited" is plural. To correct it, we can change the verb to its singular form: "He visited their grandparents last weekend."

2. "The children visited their grandparents last weekend." This sentence demonstrates correct subject-verb agreement because the subject "The children" is plural, and the verb "visited" is also plural.

3. "They visited their grandparents last weekend." This sentence is correct in terms of subject-verb agreement because the subject "They" is plural, and the verb "visited" is also plural.

4. "The children visit their grandparents last weekend." This sentence does not exhibit subject-verb agreement because the subject "The children" is plural, but the verb "visit" is in the present tense. To correct it, we can use the past tense of the verb: "The children visited their grandparents last weekend."

In summary, the sentences that demonstrate correct subject-verb agreement are:

- "The children visited their grandparents last weekend."
- "They visited their grandparents last weekend."