Pronunciation - Contractions

source: Oxford Online English    2013年9月4日
the full lesson:
A "contraction" is when we make words shorter. For example, "isn't" is a contraction of "is not." Contractions are very common in English, and if you want to speak well, you need to use them. But, contractions can be complicated! In this lesson, we'll look at different ways to use contractions, example sentences, and common mistakes to avoid.