toshokan de ookina koe o dashite wa ikemasen.

direct object particle

Breakdown of toshokan de ookina koe o dashite wa ikemasen.

• で: location particle
• 図書館としょかん: library
• 声こえ: voice

Questions & Answers about toshokan de ookina koe o dashite wa ikemasen.

Why is で used after 図書館?

で marks the place where an action happens.

• 図書館で = in/at the library (where the action takes place)

Here, the action is 声を出す (to make/use a voice, in this context to speak loudly / make loud noise), so で is the natural particle.

Compare:

• 図書館で勉強します = I study at the library
• 図書館に行きます = I go to the library

So:

• に often marks destination
• で often marks location of an action

Why is it 大きな声 and not 大きい声?