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

短语讲解：

1. Today we are going to talk about the perfect verb tenses.

talk about 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. It comes from the Latin word perfectum, which means “complete.”

come from 来自
例句：Ambient noise may come from any direction. 
外界噪声可以来自任意方向。 

3. The adverbs never, already, yet and so far are common in the present perfect.

so far 到目前为止
例句：Now, I have so far merely made assertions. 
直到现在为止，我只是在作论述。 

4. “My grandfather passed away before I was born,” has the same meaning as “My grandfather had passed away before I was born.”

pass away 去世; （时间等） 消磨掉
例句：As soon as the sun comes out, the mist will pass away. 
太阳一出来,雾就会消失。 

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

refer to 参考; 指的是; 涉及
例句：I mention this point now in passing and shall refer to it again.
这一点现在顺便提一下，以后还会讲到。
in advance 提前; 先期; 在前头; 预先
例句：Everything has been fixed in advance.
一切都是事先确定好了的。