Questions & Answers about En esta frase, el sujeto va antes del verbo.
En esta frase means in this sentence or in this phrase. It sets the context first: the speaker is talking about what happens in this particular sentence. Starting with this kind of prepositional phrase is very natural in Spanish.
The basic structure is:
En + esta frase
= in + this sentence/phrase
Spanish often puts this kind of information at the beginning when it frames what the statement is about.
Because frase is a feminine noun in Spanish, so the demonstrative has to match it.
So:
- esta frase = correct
- este frase = incorrect
This is a standard agreement rule in Spanish: articles, demonstratives, and adjectives often match the noun in gender and number.
The comma separates the introductory phrase from the main statement.
The comma helps readability and signals a pause. In short sentences like this, Spanish may sometimes include the comma to mark the introductory element clearly. You may also see similar structures without a comma in other contexts, depending on style.