How to Say "by studying" in Spanish
The Spanish word for “by studying” is “estudiando” — A1 level. This is a very common word in everyday Spanish.

Examples
¿Qué estás estudiando ahora mismo?
What are you studying right now?
Llevo estudiando la carrera de medicina por tres años.
I have been studying medicine for three years.
Estudiando mucho, logró aprobar el examen.
By studying a lot, he managed to pass the exam.
The 'Continuous' Action
This form is used with the verb 'estar' (to be) to show an action happening right now or ongoing over a period of time: 'Estamos estudiando' (We are studying).
Explaining How
You can use 'estudiando' by itself to explain the method or manner of an action: 'Paso el tiempo estudiando' (I spend time by studying).
Using the Infinitive
Mistake: “Estoy estudiar.”
Correction: Estoy estudiando. Remember, Spanish requires the '-ando' or '-iendo' form (the gerund) when talking about an action that is currently happening.
Placing Pronouns
Mistake: “Lo estoy estudiando.”
Correction: Both 'Lo estoy estudiando' and 'Estoy estudiándolo' are correct when attaching 'lo' (it). Spanish allows you to put the short word either before 'estar' or attached to the gerund.
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