.I want a glass of water-

I- subject
water-obj of preposition "of"
a glass- direct object

.They elected him the personal manager
they- subject
elected-verb
him- direct object
personal manager-

.The youths are leaders of tomorrow
youths- subject
leaders- direct object
of tomorrow-obj of preposition "of"

.you can have part of the money.
you- subject
have- verb
part-obj of preposition "of"
money-direct object

Rhea S.
today at 12:28pm

I'm not sure of it though writeacher

What are your exact instructions for these?

1. correct

2. almost correct
Read about object complements here:
http://guidetogrammar.org/grammar/objects.htm#objects

3. correct

4. incorrect — try again
(The whole verb is "can have.")

In the sentences you provided, the subjects are the ones performing the action or being talked about. The direct objects are the nouns or pronouns that receive the action of the verb directly, while the objects of prepositions are nouns or pronouns that follow prepositions and provide more information about the verb or another noun in the sentence.

To determine the subjects, direct objects, and objects of prepositions in a sentence, you can follow these steps:

1. Identify the verb: Find the word that shows the action or state of being in the sentence. In the given sentences, the verbs are "want," "elected," "are," and "have."

2. Ask "who" or "what" after the verb: Determine the answer to the question "who" or "what" does the verb to find the direct object. In the sentence "I want a glass of water," the direct object of the verb "want" is "a glass of water" because it answers the question "what do I want?"

3. Identify the subject: The subject is the noun or pronoun that performs the action of the verb or that the verb describes. In the sentence "I want a glass of water," "I" is the subject because it is the one performing the action of wanting.

4. Find the objects of prepositions: Look for prepositions in the sentence, which are words that indicate the relationship between other words in the sentence. The objects of prepositions are the nouns or pronouns that follow them. In the sentence "The youths are leaders of tomorrow," the object of the preposition "of" is "tomorrow," which provides more information about the noun "leaders."

By following these steps, you can identify the subjects, direct objects, and objects of prepositions in a sentence.