phonetics symbol

English as a Second Language Listening, speaking, pronunciation and accent
1

I can break the word watching to it’s smallest unit

{watch} is a free morpheme and it’s a verb
{ing} is a bound morpheme, suffix forming an adverb

I can find the phonetics symbol for {watch} but
how do I represent the {ing} in phonetics symbol?

2

[wɔtʃ]
[ɪŋ]

3

those units are called syllables
“ing”=ŋ