一般现在时代替过去时
1 )"书上说"，"报纸上说"等。
The newspaper says that it's going to be cold tomorrow.
报纸上说明天会很冷的。
2) 叙述往事，使其生动。
Napoleon's army now advances and the great battle begins.
From:https://www.zgghmh.com/CET-4/20001521.asp
一般现在时代替过去时
1 )"书上说"，"报纸上说"等。
The newspaper says that it's going to be cold tomorrow.
报纸上说明天会很冷的。
2) 叙述往事，使其生动。
Napoleon's army now advances and the great battle begins.