Simple future (e.g.: falarei)

Questions about the Simple Future

Q: Why is it eu começarei and NOT eu começará?
The eu ending for the simple future is -ei, NOT -á. The ending -á is used for ele/ela/você.

Q: Why is it ela fará and NOT ela fazerá?
The verb fazer has an irregular future stem (far-), so the correct form is fará, not fazerá.