I agree with Piyali.
The methods of teaching English in textbooks are holdovers from the way Latin was taught to scholars back in the 12-13th centuries. It does not even make sense to native English speakers.
I have been teaching English over 30 years to American college students whose schooling is in English speaking schools. They have different oral communication problems than those from a nonEnglish background, but still have difficulty making themselves on topics other than concerts, dating, and sports events. In written English, most are simply incompetent.
Linda Aragoni
http://www.you-can-teach-writing.com
http://twitter.com/LindaAragoni
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