My grandfather did not remember that he had lost his reading glasses.  My grandfather did not remember _______________________________.

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My grandfather did not remember that he had lost his reading glasses.

⇒ My grandfather did not remember _______________________________.

Giải thích

My grandfather did not remember having lost his reading glasses.

Kiến thức: Cấu trúc với “remember”

Giải thích: Remember + having + V-pp: nhớ đã làm gì.

Dịch nghĩa: Ông tôi không nhớ là mình đã làm mất kính đọc sách.