19. It's no use to try. It's _of_ no use to try.
20. My sister stayed home. My sister stayed _at_ home.
21. Why do you act that way? Why do you act _in_ that way?
22. We left the third of June. We left _on_ the third of June.
The object of a preposition is always in the objective case. Some people have great difficulty in recognizing that in such expressions as _for you and me_, the pronoun _me_ is as much the object of the preposition _for_ as the pronoun _you_. Both words must be in the objective case. It is incorrect to say _for you and I_.
In the following sentences omit the incorrect italicized form:
1. The invitation is for father and _I_--_me_.
2. Every one has finished his work except _he_--_him_ and _I_--_me_.
3. It's a question that you and _I_--_me_ must decide; it refers to you and _I_--_me_ alone.
4. Girls like you and _she_--_her_ should have a good influence over the others.
7. No one objected but _they_--_them_ and _we_--_us_.
9. They were sitting near you and _I_--_me_.
10. We expect you to return with mother and _I_--_me_.
11. He wanted my brother and _I_--_me_ to go into business with his brother and _he_--_him_.
12. Neither _she_--_her_ nor her sister have I seen for several months.
13. My companion and _I_--_me_ took up the trail of the bear at once. For some distance it led _he_--_him_ and _I_--_me_ over the soft, yielding carpet of moss and pine needles, and the footprints were quite easily made out.
14. _He_--_him_ and _I_--_me_ had, of course, to keep a sharp lookout ahead and around for the grizzly.
15. All are going on the excursion except _he_--_him_ and _I_--_me_.
16. _He_--_him_ and _I_--_me_ went fishing.
17. The rule applies to _we_--_us_ all--the manager, _they_--_them_ who keep books, you, and _I_--_me_.
18. She beckoned to my companion and _I_--_me_.
19. The letter was to be read by the president or _I_--_me_.
20. He did it for the sake of my father and _I_--_me_.
21. We study Shakespeare with her sister and _she_--_her_.
22. _She_--_her_ and her sister went to the lecture with my sister and _I_--_me_.
23. They sent for _she_--_her_ and _I_--_me_, not you and _he_--_him_.
24. The program was arranged by the president and _I_--_me_.
25. They found that his father and _he_--_him_ had already left.