The letter carrier brought my brother two large envelopes last Monday.

Which word is the direct object in the given sentence?

I think its brother. Am I right?

No.

What did the letter carrier actually bring? What did s/he actually deliver?

Envelopes?

Thank you for your help

Right.

You're welcome.

envelope

No, "brother" is not the direct object in the given sentence. The direct object is a noun or a pronoun that directly receives the action of the verb. In this sentence, the action of the verb "brought" is being done to the two large envelopes, not to your brother.

To identify the direct object, you can ask the question "What or whom did the letter carrier bring?" In this case, the answer would be "two large envelopes." Therefore, "two large envelopes" is the direct object in the sentence.