重点讲解：
1. in the past
在过去（通常用于一般过去式和现在完成时）；
eg. He could remember events far back in the past.
他能记得很早以前的事情。
eg. I've been there many times in the past.
我从前去过那儿很多次。
eg. She treats him as if he were a stranger. Nobody can see that they were best friends in the past.
她待他如陌生人。谁也看不出他们曾经是朋友。
2. I can honestly say
口语常用，表示“老实说；我可以诚实的说”；
eg. I can honestly say it was the greatest thrill I have ever experienced.
老实说,这是我所经历过的最激动人心的事.
eg. I can honestly say that I am a changed man.
老实说我已经完全改过自新了。
eg. I can honestly say that I am looking very forward to meeting him in person one day.
坦白的说，我很希望能够以个人身份见到他。
