chaeksang wie chaegeul nohayo.

I put a book on the desk.

Breakdown of chaeksang wie chaegeul nohayo.

• ~에: destination particle
• ~을: object particle
• 책: book
• 책상: desk

Questions & Answers about chaeksang wie chaegeul nohayo.

Why is 위에 used in this sentence instead of just 위 or another particle?

위에 combines the noun 위 (“top” or “above”) with the location particle -에, indicating “at/on that spot.”

• 위 alone is just the noun “top.”
• 위에 specifically means “on top of.”
  Other particles like 에서 mark “at/in” for actions taking place there, but here you’re placing something on a surface, so 위에 is correct.

What role does 을 play in 책을?

The particle -을 is the object marker. It tells us that 책 (“book”) is the direct object of the verb 놓아요 (“put”).

• If the noun ends in a vowel, you’d use -를 (e.g. 사과를).
• If it ends in a consonant, you use -을, as in 책(ㄱ) + 을.

What does the verb 놓아요 mean, and how is it formed?

놓아요 comes from the dictionary form 놓다 (“to put” or “to place”).
Formation:

1. Remove -다, giving the stem 놓-.
2. Since the stem ends in the vowel ㅗ, you add -아요 → 놓아요.
   This ending also indicates polite present tense.

Why is the sentence ordered as 책상 위에 책을 놓아요 and not something like “I put the book on the desk”?