If my memory serves me right, you still owe me one thousand dollars.
如果我沒記錯的話,你還欠我一千塊錢。
If my memory serves me right, it happened in the summer of 1999.
如果我沒記錯的話,這件事發(fā)生在1999年的夏天。
If my memory serves me right, you told me you would return next month.
如果我沒記錯的話,你曾說過你下個月就回。