[j], [w] : phonetic symbols

Are both consonants or vowels?
They are called semi-vowels, but we add 'a' not 'an'.
ex. a year, a woman.

A is put before a consonant and an is put before a vowel, isn't it.

I'd like to know about [j], and [w].

Do you have a good website for that?

There are several entries here that discuss semivowels:

http://www.answers.com/topic/semivowel

They are consonants, however, and I can think of only one (h) before which some people use "an" rather than "a" -- that is, you'd say and write about "drinking from a well" or "giving out a yell."

If you have words or sentences with specific instances of words like these, please post them, and we'll see if we can help you understand.

Yes, I can provide you with a good website to learn about the phonetic symbols [j] and [w]. One reliable and comprehensive resource for studying phonetics is the International Phonetic Alphabet (IPA) chart on the website of the International Phonetic Association (IPA). The IPA chart provides detailed information on each symbol, including the sounds they represent, example words in various languages, and audio recordings to help with pronunciation.

You can access the IPA chart by visiting the official website of the International Phonetic Association at www.internationalphoneticalphabet.org. On the website, navigate to the "IPA Charts" section, where you will find different charts organized by sound category. [j] and [w] are both classified as consonants in the IPA chart. You can explore the charts and click on each symbol to learn more about their pronunciation and usage.

Additionally, many reputable English language learning websites and dictionaries also provide explanations and audio examples for phonetic symbols. Websites like the British Council's LearnEnglish and Cambridge Dictionary Online are good resources to consider.