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"A las siete" is a phrase which is often translated as "at seven", and "veinte" is an adjective which is often translated as "twenty". Learn more about the difference between "a las siete" and "veinte" below.
a las siete(
ah
lahs
syeh
-
teh
)A phrase is a group of words commonly used together (e.g., once upon a time).
a. at seven
¿Quieres que vayamos a tomar algo juntos después del trabajo? Yo salgo a las siete.Would you like to have a drink with me after work? I finish at seven.
veinte(
beyn
-
teh
)An adjective is a word that describes a noun (e.g., the big dog).
A masculine noun is used with masculine articles and adjectives (e.g., el hombre guapo, el sol amarillo).
2. (number)
b. twentieth (in dates)
El veinte del mes que viene me voy a España.I'm going to Spain on the twentieth of next month.