Give the correct form of the verbs in the brackets to complete the sentences
Our pool pump _________(not/work) properly before the storm.
Giải bởi Vietjack
Câu diễn tả hành động xảy ra trước 1 hành động trong quá khứ tiếp tục cho tới thời điểm đó=>quá khứ hoàn thành tiếp diễn
Công thức: S + had (not) + been + V-ing
=>Our pool pump had not/hadn’t been working properly before the storm.
Tạm dịch:Cho đến trước khi bão đến, máy bơm nước vào bể đã không làm việc hiệu quả.
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