really important

please could you tell me what is the difference between phonology , morphology and syntax?

Phonology = the study of sounds in a particular language or in languages generally

Morphology = the scientific study of the structure and form of either animals and plants or words and phrases

Syntax = the grammatical arrangement of words in a sentence


I find it a bit worrying that you need to ask this question. Do you have access to English dictionaries?

in fact I am a foreign english learner and I need these question in my study I am still a bigginer.Anyway, thanks for the answer

I do understand, but you really should make use of dictionaries as well.

There is a good online dictionary: OneLook Dictionary Search which is worth using.