美语听力与发音技巧.doc

美语听力与发音技巧.doc美语听力与发音技巧

　　导语：。俗语说听说读写，听还是排在第一位的。下面我们一起来看看这些听力范文吧。

　　listen 1

　　Welcome to Daily Tips on Learning English. Today’s tip is on expressing ability in the past.

　　There are two ways of expressing ability in English. One, “can” or “could”. Two, “be able to”. In negative sentences, there’s no difference in meaning. So, “I couldn’t lift the piano” and “I
wasn’t able to lift the piano” mean the same thing. However, in affirmative sentences about past ability, “could” usually means “used be able to”. The use of “could” usually indicates that the
ability existed in the past, but does not exist now.

　　For example, “When I was young, I could run fast” means that I can not run fast now. On the other hand, if the speaker is talking about an ability to do something at one particular time in
the past, “was/were able to” can be used in affirmative sentences, but “could” cannot.

　　For example, your car broke down. It stopped working. So you took it to get fixed two days ago. When I saw you today, you told me that the mechanic fixed your car. If you said, “The mechanic
could fix my car yesterday”, that sentence is not correct. You must say, “The mechanic was able to fix my car yesterday” or “The mechanic managed to fix my car yesterday.”

　　Let’s look at another example. I have been looking for a CD I like for a long time. I could