Jawaban:

Clipboards are made by my father in the school yard yesterday.

Penjelasan:

Passive voice adalah kalimat pasif di mana subjek (pelaku) dikenakan aksi (action) oleh objek (benda).

Example:

Active: She eats fried rice ( Subject + V1 + Object)

Passive: Fried rice is eaten by her (S + to be (sesuai tenses) + V3 + by + agent)

Bentuk umum passive voice:

Subject + to be (disesuaikan) + V3

Active: My father makes clipboards in the school yard yesterday. (S + V1 + O)

Passive: Clipboards are made by my father in the school yard yesterday. (S + are (to be) + made (verb) + by + father (agent))

Hope it helps! ^___^