I want to ask you just a question:
look at those two sentances:
America-greece committee meet tomorrow.
America-greece committee to meet tomorow.
What is the differance between those two sentances..and what is the function of (to) in the second?
Sentence one needs a revision in the verb:meets, is meeting, or will meet.
The second is not a sentence because it has no verb; the "to" in "to meet" makes it an infinitive, and while the infinitive is one of the five principal parts of a verb, it does not function as a verb itself. Usually the infinitive acts like a noun. Without further modification it can be made into a sentence with "to be:" The America-greece committee is to meet tomorow.
Also note that tomorrow is misspelled, and that American-Greek might be a better form to use: The American-Greek committee is to meet tomorrow.