Besides the thai consonants, vowels and numbers, there are a couple
of extra symbols that are commonly used in Thai sentences.These
extra symbols are similar in function to certain punctuation symbols,
that we find in English. In the Thai language, for example, when
you write down an abbreviation, you must mark it out, by placing
an "abbreviation symbol" after it. Not dissimilar to using
the period (full-stop) symobl in english, when marking certain abbreviations.
There is also a reduplication symbol in the Thai language, which
indicates that the word that it appears after, must be read or spoken
twice. There are really only a few common symbols that you'll need
to recognise, and these are all covered in "60 Minutes to Learn
the Thai Alphabet". You'll have them commited to memory in
seconds, after glancing at the memorisation images.