Question

.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

Answer 1

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.")