先月

1. Origins, structure, and basic meaning

• Structure: 先月 is read as せんげつ and means “last month”.
• Basic usage: It marks a family trip last month and a book borrowed during that month.

2. Common pitfalls and similar expressions

• 先月、 / 先月借りた
  • Use 先月、 to set the sentence time and 先月借りた inside a relative clause modifying a noun.