kanozyo ha atarasii megane wo kau tame ni eki mae no meganeya ni ikimasita.

ために after a verb in dictionary form usually means “in order to … / for the purpose of …”.

Pattern:

• V‑dictionary form + ために + main action
• 新しい眼鏡を買うために行きました
  = (She) went in order to buy new glasses.

So 買うために is a purpose clause (to buy), and 行きました is the main action (went). Together:
新しい眼鏡を買うために行きました = (She) went in order to buy new glasses.

The を here belongs to the verb 買う, not directly to 行きました.

• Small clause: 新しい眼鏡を買う = “to buy new glasses”
  → in that clause, 新しい眼鏡 is the direct object, so it takes を.
• This whole clause is then turned into a purpose phrase with ために:
  • 新しい眼鏡を買うために = “in order to buy new glasses”.

So the structure is:

• [新しい眼鏡を買う] ために 行きました
  The object marker を is doing its normal job inside the 買う clause.

They look the same, but they have different roles:

1. 買うために

   • Here, に is part of the fixed pattern V‑dictionary form + ために = “in order to V”.
   • It marks purpose.

2. メガネ屋に行きました

   • Here, に marks the destination of 行きました (went).
   • It means “to (the glasses shop)”.

So:

• …買うために = in order to buy …
• メガネ屋に行きました = went to the glasses shop.

They are the same particle に, but with different grammatical functions: purpose vs destination.

Breakdown:

• 駅 = station
• 前 = front
• 駅前 (as a compound noun) = “the area in front of the station”, not just the literal few meters in front; it often means the station-front neighborhood.

Then:

• 駅前のメガネ屋
  • メガネ屋 = glasses shop
  • 駅前のメガネ屋 = “the glasses shop in front of the station” / “the station-front glasses shop”.

Here の links two nouns and can mean things like:

• “located in/at”
• “of / belonging to”
• “in the area of”

So 駅前のメガネ屋 is “the glasses shop that is in the station-front area.”

Both 眼鏡 and メガネ mean “glasses”.

• 眼鏡 (kanji): more traditional/standard dictionary form.
• メガネ (katakana): very common in everyday writing; can feel a bit lighter, more modern, or brand‑name/store‑sign‑like.

In real Japanese, it’s common to mix:

• 眼鏡 in the explanatory part (e.g., 新しい眼鏡を買う),
• メガネ屋 for the store name / type of store, which often appears in katakana on signs.

You could also write 眼鏡屋; it’s still correct. The choice is mostly about style and feel, not a difference in basic meaning.

屋 (や) often means “shop / store for X” or “person who does X”, depending on context.

• パン屋 = bakery (bread shop)
• 本屋 = bookstore
• 花屋 = florist
• メガネ屋 = glasses shop / optician’s (informal term)

So メガネ屋 literally is “glasses shop.”

In this sentence, 彼女は is natural because:

• は marks the topic: “As for her, …”
• The sentence is just telling you what she did; she’s the topic of the narrative.

If you used 彼女が, it would:

• Mark 彼女 as the grammatical subject and often emphasize or contrast her:
  • e.g. implying “She (as opposed to someone else) went to the shop.”

Both can be grammatically possible, but:

• 彼女は … 行きました sounds like neutral narration.
• 彼女が … 行きました would be used when you specifically want to highlight she in contrast to others.

Yes, you can reorder many parts before the verb in Japanese. Both are acceptable:

• 彼女は新しい眼鏡を買うために駅前のメガネ屋に行きました。
• 彼女は駅前のメガネ屋に新しい眼鏡を買うために行きました。

The meaning is essentially the same: “She went to the glasses shop in front of the station in order to buy new glasses.”

Key rule:

• The main verb (行きました) must stay at the end.
• Modifiers like purpose phrases and destination phrases can be swapped around before the verb, within reason.

Most commonly, you would just change the verb to the plain past:

• 彼女は新しい眼鏡を買うために駅前のメガネ屋に行った。

Other possible casual variations:

• Drop 彼女は if it’s already clear who you’re talking about:
  新しい眼鏡を買うために駅前のメガネ屋に行った。
• Or make it slightly explanatory:
  新しい眼鏡を買うために駅前のメガネ屋に行ったんだ。

The politeness difference mainly shows up in 行きました → 行った.

In Japanese, i‑adjectives like 新しい always come before the noun they directly modify:

• 新しい眼鏡 = “new glasses”
• 大きい家 = “big house”
• 面白い本 = “interesting book”

You cannot say 眼鏡新しい as a single noun phrase. If you want “the glasses are new,” you need a full sentence structure:

• 眼鏡は新しいです。 = “The glasses are new.”

彼女 can mean both:

1. “she / her” (3rd‑person pronoun)
2. “girlfriend”

In this one sentence alone, it’s ambiguous. You need context:

• If the story is narrating about a female person in general, 彼女 = she.
• If someone is talking about their romantic partner, 彼女 usually = girlfriend:
  • e.g. 彼女とデートに行きました。 = “I went on a date with my girlfriend.”

Example sentences in textbooks often intend “she”, unless it’s clearly about relationships.

Yes, that’s very natural:

• 新しい眼鏡を買いに駅前のメガネ屋に行きました。

Comparison:

1. 買うために行きました

   • Pattern: V‑dictionary form + ために + 行く
   • Meaning: “went in order to buy …”
   • Slightly more formal / explanatory; can be used in writing, or when emphasizing reason/purpose.

2. 買いに行きました

   • Pattern: V‑ます‑stem + に + 行く
   • Meaning: “went to buy …”
   • Very common and colloquial, especially in spoken Japanese.

In everyday speech, 新しい眼鏡を買いに駅前のメガネ屋に行きました (or 行った) might be the most natural version, but 買うために is also perfectly correct and just a bit more neutral/formal in tone.