英语听力:美语听力与发音技巧 第33期
listen 33 发布时间:2005-08-19 美语听力与发音技巧 第33期(表示过去的能力) 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... [ 查看全文 ]英语听力:美语听力与发音技巧 第33期的相关文章