Eventually, you just start getting the tones right because you speak and listen so much. I can get by native sometimes (limited only by my bad vocabulary) and I've never study tones consciously for words I learn.
When I'm really tired, I sometimes change my 'sh' to 's' and sound more southern. Nobody really cares. However, I do screw up sometimes when saying words like "jichang" and "jingcheng," and will wind up on the wrong expressway in the taxi. This has not much to do with tones though.
When I'm really tired, I sometimes change my 'sh' to 's' and sound more southern. Nobody really cares. However, I do screw up sometimes when saying words like "jichang" and "jingcheng," and will wind up on the wrong expressway in the taxi. This has not much to do with tones though.