She rarely (eats) fast food because she prefers healthy meals.

• কোনো নির্দিষ্ট সময় উল্লেখ থাকে না এমন বাক্যে - Adverb of frequency (how often): always, ever, regularly, everytime, frequently, often, usually, sometimes, occasionally, seldom, rarely, never, regularly, normally, traditionally, again, once, twice, thrice, ever, weekly ইত্যাদি উল্লেখ থাকলে সব সময় Present Indefinite Tense হয়।

যেমন: 
1. I always drink a cup of coffee in the morning to start my day.
2. She rarely eats fast food because she prefers healthy meals.
3. They usually go for a walk in the evening after dinner.
4. He occasionally visits his grandparents who live in a different city.
5. We often meet up with friends on weekends to socialize.