Business English: A Practice Book by Rose Buhlig

22. We left the third of June. We left _on_ the third of June.

=Exercise 127= 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: