Can one say
a. I sent my son to the conservatory to be taught music.
b. Our country produces fruit to be exported.
c. Our country produces fruit for export.
In (b) and (c) is all the fruit we produce exported or only some of it?
This is the place to post questions and discussions on usage and style. The members of the Wordwizard Clubhouse will also often be able to help you to formulate that difficult letter.
End of topic.