1. Cấu trúc
Khắng định: S + was/were + V-ing.
Phủ định: S + was/were + not + V-ing.
Nghi vấn: Was / Were + S + V-ing?
2. Ví dụ
- He wasn’t working when his boss came yesterday. (Hôm qua anh ta đang không làm việc khi sếp của anh ta đến)
- Was your mother going to the market at 7 A.M yesterday? (Lúc 7 giờ sáng hôm qua mẹ em đang đi chợ có phải không?)
- We were just talking about it before you arrived. (Chúng tớ đang nói về chuyện đó ngay trước khi cậu đến.)
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