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to make you undoubt on this.
1) your pdf there are spaces >>>>> because to help the newlearner indicate words in lines.
2) in general, Thai words in lines,sentences are not separate at all except:
example:
when you talking about some specific groups:
i went to market and i bought,banana, pineable, fruits, vegetable.
in Thai, it will be writen like this:
iwenttomarketandibought: banana pineable fruits vegetable.
yes, in this case we make the spaces:
goodluck and have fun in learning Thai.