Subjects and verbs must agree — Language, 11–13 years
A sentence becomes easier to follow when its subject and verb match in number and person. Language, 11–13 years.
The verb matches the subject
The subject tells us who or what acts, and the verb changes to fit it. We say The bird sings but The birds sing: the verb shows whether there is one bird or more than one. In some languages, it also changes with the person speaking.
Why make them match?
When a sentence contains several nouns, it can be unclear who is doing the action. Matching the subject and verb gives the reader a quick clue: one fox runs, but two foxes run. The pattern is especially useful when the subject and verb are far apart.
Finding the matching verb
Take this sentence: The basket of apples is on the table. First, find the subject: basket, not apples, because the basket is on the table. Basket is singular, so choose is, not are. The extra phrase of apples can distract us, but it does not control the verb.
The nearest noun is not always in charge
A common mistake is to match the verb with the nearest noun. In The box of old toys was heavy, old toys is closer, but box is the subject, so was is correct. The mistake makes sense because our eyes notice the closest word first; checking who or what acts prevents it.
Agreement in real writing
You use agreement in messages, stories, instructions and reports whenever a sentence says who does something. It helps a reader follow the action without stopping to repair the sentence in their head. In speech, people may overlook a mismatch, but careful writing makes the relationship easier to see.
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