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The prisoner is thought to escape by climbing over the wall.
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The prisoner is thought escaped by climbing over the wall.
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The prisoner is thought having escaped by climbing over the wall.
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The prisoner is thought to have escaped by climbing over the wall.
Đáp án: The prisoner is thought to have escaped by climbing over the wall.
Giải thích : câu bị động kép chuyển đổi từ cấu trúc:
People + V1 + that + S V2 = S + be + V1-ed + to V2/ have V2-ed: người ta nói rằng…. Hai động từ V1, V2 lệch thời nên chia to have Ved