Formulir mana yang melengkapi “What would our lives be if X-ray machines ...”?

Pertanyaan

What would our lives be if X-ray machines ...

Pilihan jawaban

1. were not invented
2. would not have been invented
3. had not invented
4. had not been invented

Jawaban

had not been invented — option 4.

Penjelasan

Kondisi tersebut menyangkut peristiwa masa lalu: penemuan mesin sinar-X. Kondisi masa lalu yang tidak nyata menggunakan Past Perfect. Karena mesin menerima aksi penemuan, diperlukan bentuk pasif:

had not + been + invented.

Kalimat lengkapnya adalah What would our lives be if X-ray machines had not been invented?. Hasilnya menggambarkan keadaan hipotetis kehidupan kita, sedangkan kondisinya membayangkan masa lalu yang berbeda.