よい vs. いい

[Jordi]

みんな　さん　こんにちわ　

when would one use よい instead of　いい? for example,

いい天気ですね。 is alright,

but is　
明日はよい天気ですか？

fine?

どうも　ありがとう

[Alan]

The main thing to remember is that you cannot conjugate 'ii'. So if you want to say not-good, you have to go with 'yokunai'. Similarly for other conjugations.

As far as directly replacing 'ii' with 'yoi'. It doesn't seem to be usual practice, but I did find some matches with google, so I guess it's Ok.

[Charles]

こんにちわ

It's written as...

こんにちは

I don't know how the article 「は」ever came to be pronounced "wa" (or maybe it was the "wa" article that came to be written as 『は』), but don't worry, it rightly confuses beginners.

[Jordi]

The main thing to remember is that you cannot conjugate 'ii'. So if you want to say not-good, you have to go with 'yokunai'. Similarly for other conjugations.

As far as directly replacing 'ii' with 'yoi'. It doesn't seem to be usual practice, but I did find some matches with google, so I guess it's Ok.

alanさん　ありがとう　それは面白いです！　ほんとに　ありがとうございます 　私は知りません　でした

[Alan]

alanさん　ありがとう　それは面白いです！　ほんとに　ありがとうございます 　私は知りません　でした

jordiさん、どういたしまして。