Subject and Object
In a simple English sentence such as “The boy wrote a letter,” “The boy” is the person or thing doing the action (in this case, writing), and is therefore the subject of the sentence. In the same sentence,
“a letter” is what the verb was done to, and is therefore the object of the verb. The subject of a sentence is sometimes known as the nominative case and the object of a sentence is sometimes known as the accusative case.
