Rendezvous.
Usted is the formal way of saying 'you'.
Purchase
He/she has been killed
Probably saying deceased.
¿cómo está usted?
It is not that simple. Formal and masculine forms do not apply when writing "your".
The formal way of saying "to try hard" is "to exert oneself" or "to make a concerted effort." This phrase conveys a sense of determination and dedication towards achieving a goal. Another alternative could be "to apply oneself diligently," which emphasizes focused and sustained effort.
Your method of approach is ineffective.
It is a more formal way of saying goodbye.
A formal way of saying "change" is "modification" or "transformation." These terms convey a sense of deliberate alteration or adjustment in a particular context. Depending on the situation, one might also use "amendment" or "revision" to indicate a formal change to a document or policy.
A formal way of saying "basically" is "essentially." This term conveys the core idea or fundamental aspect of a concept without the informal tone. Other alternatives include "fundamentally" or "in essence," which can also serve to express a similar meaning in a more formal context.
Well you say "What time is it?" and that should do the trick