Borang yang manakah melengkapkan “What would our lives be if X-ray machines ...” ?

Soalan

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

Pilihan jawapan

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

Jawapan

had not been invented — option 4.

Penjelasan

Keadaan ini melibatkan peristiwa lampau: penciptaan mesin sinar-X. Keadaan lampau yang tidak nyata menggunakan Past Perfect . Oleh kerana mesin menerima tindakan ciptaan, bentuk pasif diperlukan:

had not + been + invented .

Ayat yang lengkap ialah What would our lives be if X-ray machines had not been invented? Hasilnya menggambarkan keadaan hipotesis kehidupan kita, manakala keadaan itu membayangkan masa lalu yang berbeza.