`Answer`

He/spend/hours/do/the housework everyday.

`->` He spends hours doing the housework everyday.

We/often use/earbubs/listen/music.

`->` We often use earbubs to listen to music.

I /writing/apply for/job/volunteer kitchen helper/peace village centre.

`->` Thiếu tobe : `Am`

`->` l am writing to apply for a job as a volunteer kitchen helper in your Peace Village Centre.

$1.$ He spends hours doing the housework everyday.

- "everyday": chỉ tần suất.

$→$ S + V (s/es).

- S + spend + time + V-ing: mất bao lâu để làm gì.

$2.$ We often use earbuds to listen to music.

- "often": chỉ tần suất.

$→$ S + V (s/es).

$3.$ l am writing to apply for a job as a volunteer kitchen helper in your Peace Village Centre.

- Hành động đang xảy ra tại thời điểm nói.

$→$ S + to be + Ving.