hatsuon o kakuninsuru toki wa, heddohon o shite reibun o nando mo kiite iru.

topic particle

Breakdown of hatsuon o kakuninsuru toki wa, heddohon o shite reibun o nando mo kiite iru.

• を: direct object particle
• 聞きく: to listen
• とき: when

Questions & Answers about hatsuon o kakuninsuru toki wa, heddohon o shite reibun o nando mo kiite iru.

What does the particle を do after 発音 in 発音を確認する?

を marks 発音 (pronunciation) as the direct object of the verb 確認する (to check / to confirm).

So 発音を確認する literally means to check pronunciation.

• 発音 = pronunciation
• を = marks what is being checked
• 確認する = to check / to confirm

Why is 確認する in dictionary form before とき? Why not 確認したとき or 確認するときに?

With とき, the form of the verb before it shows the time relationship:

• 確認するとき = when I check (the checking and the main action happen about the same time; a general, repeated situation)
• 確認したとき = when I checked (after I had checked; more past/completed feel)

Here, this is a general routine: When I check pronunciation, I do X, so the dictionary form 確認するとき is used.

Also, using に (確認するときに) would be possible, but:

• ときは focuses on that situation as a topic.
• ときに focuses more on the time point when something happens.

In a habitual description, 〜ときは is very natural.

What is the function of は after とき in 確認するときは?