The preposition to is a versatile word in English with several meanings and uses. Here are some of the most common meanings and uses of to: destination, movement, direction, time, purpose, range, giving, as a part of infinitive verb and ets.
Till and until are used as conjunctions to indicate points in time, conditions, or events in relation to which other actions or events occur. They convey the idea of when something happens, stops happening, or is contingent upon another condition.
since primarily focuses on specifying a starting point in time or expressing a cause-and-effect relationship, while from is more versatile and can indicate starting points in time, place, or ranges of values.
