People in general assume that in learning a foreign language, fluency is more important than accuracy. This view often urges language learners to think that perfecting sentence structure and comprehending vocabulary are more important than learning how native speakers articulate words, and leads them to generate errors in the articulation of the language's speech sounds. However, precision in pronouncing words is especially essential for language learners, and English, in terms of pronounciation, is the most difficult language to master.
This error is easier to make in words which sounds simililar:
- pull/pool
- ship/sheep
- tree/three
There are some examples of this that you can see y listen in the following video:
http://www.youtube.com/watch?v=CrIfQTOl97k&feature=related
Both following activitis could improve the phonological errors making the teachin funny!
The best way to practice and improve this kind of errors is hearing as much as possible the English language and a good method for this could be watching their favourite cartoons, series or films in english: