My 2nd book: 1)thesaurus? or 2)Textbook?
(2015-11-05 1)is easier, so quicker; 2) will compete earlier for more needed, but longer
3750萬西班牙語,290萬中文, not only my book "Secrets of Words" will narrow this gap, but more will use Chinese as tool, such as 4 tones, to learn English.
四聲之謎,將大白天下; 八方來會,相中黑厚學
I added 4 pages to guide the effective reading http://www.amazon.com/dp/0986078301
Those code-switching words may be from opposite tendencies: Some are easier to say, like "just" is closer to their "qiaqia"; others are hard to remember so learned in a hard way and were burned into hard disc.