Question 1

Why do we need de before que in estoy seguro de que?

Accepted Answer

The core phrase is estar seguro de (to be sure of). When the thing you are sure of is an entire subordinate clause starting with que, you must keep the preposition de. Dropping it creates a common grammatical error known as queísmo. A good trick to check if the de is needed is to replace the que clause with eso (that): you would say estoy seguro de eso, so you must say estoy seguro de que.

Question 2

Why does this sentence use the indicative mejorará instead of the subjunctive?

Accepted Answer

Even though the improvement hasn't happened yet, the main clause is estoy seguro de que (I am sure that). Because this expresses absolute certainty and states what you believe to be a fact, the subordinate clause takes the indicative mood (mejorará). If you changed it to express doubt, such as no estoy seguro de que (I am not sure that), you would then need the subjunctive (mejore).

Question 3

Why use the infinitive sanar to translate the "-ing" word "healing"?

Accepted Answer

In English, words ending in "-ing" (gerunds) are frequently used as the subject of a sentence. Spanish does not use its gerund (-ando / -iendo) this way. Whenever a verb acts as a noun subject—as "healing" does here—it must be in the infinitive.

Question 4

What is the difference between using sanar and curar for "to heal"?

Accepted Answer

They are often interchangeable, but sanar emphasizes the natural process of recovering, especially for emotional, psychological, or spiritual wounds (making it perfect for este trauma). Curar leans slightly more toward the active, medical process of treating a disease or physical injury.

Estoy seguro de que sanar este trauma mejorará tu autoestima.

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