Final answer:
The sentence 'Ram likes to eat mangoes in summer' changed to past perfect tense becomes 'Ram had liked to eat mangoes in summer'. The past perfect tense shows an action that has taken place before another action in the past.
Step-by-step explanation:
In English grammar, changing the tense of a sentence is a common exercise to practice verb tenses. The sentence provided, 'Ram likes to eat mangoes in summer', is in the present simple tense.
To change it to the past perfect tense, we need to adjust the verb 'likes' to 'had liked'. This gives us: 'Ram had liked to eat mangoes in summer.'
Remember, the past perfect tense is used to show an action that took place before another action in the past.
In this case, the liking of mangoes by Ram took place before another unspecified action in the past.
Learn more about Tense Change