namae o ookiku kaite kudasai.

direct object particle

Breakdown of namae o ookiku kaite kudasai.

• 書かく: to write
• ください: please
• 名前なまえ: name

Questions & Answers about namae o ookiku kaite kudasai.

Why is を used after 名前?

を marks the direct object of the verb.

In this sentence, the verb is 書いてください (please write), and the thing being written is 名前 (name). So:

• 名前を = the name as the thing to write

A very literal breakdown is:

• 名前 = name
• を = object marker
• 大きく = largely / in a big way
• 書いてください = please write

So 名前を tells you what should be written.

Why does 大きい become 大きく?

Because 大きい is an i-adjective, and when an i-adjective modifies a verb, it usually changes to its -く form.

Here, 大きく describes how you should write, so it works like an adverb:

• 大きい = big
• 大きく = bigly / in a big way → more naturally, largely or in large letters

So:

• 大きい名前 = a big name
• 名前を大きく書く = to write the name big

This is a very common pattern:

• 早い → 早く
• 小さい → 小さく
• きれいだ is different, because it is a na-adjective