VOA慢速英语:Have You Perfected the Perfect Tenses?

短语讲解：

1. When you are talking about grammar, perfect has a different meaning.

talk about 讨论，谈论
例句：He went on to talk about his accident.
他接着谈到了他的意外事故。

2. We will start with the present perfect.

start with 以…开始
例句：Our group had five members to start with.
我们小组开始时只有五个人。

3. You should also use the present perfect to refer to a repeated action in the past.

refer to 参考; 指的是; 涉及
例句：Writers often refer to a dictionary.
作家时常参考字典。

4. When it is used, the future perfect usually refers to major life events that are planned years in advance.

in advance 提前; 先期; 在前头
例句：I have to tell him in advance.
我得事先告诉他。