Preposition "a" (to) - general use (prepositions)

The basic and general use of the Spanish preposition "a" is to express "to/at" in the following contexts:

• location 

We use "a" to express "to" + a place. It is generally used with verbs that express movement, e.g. ir or viajar.

• time

We use "a" to express the time. For example:

or to indicate the end of a period of time. For example:

See also Using para (not por) for a destination

There are some verbs that use the preposition "a" in certain constructions - see Personal "a" verbs (ver, visitar, buscar, conocer)