十一、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.拿破仑的部队冲上来了，战斗打响了。十二、一般现在时代替完成时
1.有些动词用一般现在时代替完成时：
hear，tell，learn，write，understand，forget，know，find，say,remember
I hear (=have heard)he will go to London.
I forget (=have forgotten)how old he is.
2.句型“It is...since...”代替“It has been...since...”
It is (=has been)five years since we last met.
