"No Matter" x "Doesn't Matter": Qual a diferença?

Exemplos:

a. No matter:

- No matter what they say.
- Não importa o que eles dizem.

- No matter what happens.
- Não importa o que aconteça.

b. Doesn't matter:

- Money doesn't matter.
- Dinheiro não importa.

- It doesn't really matter.
- Na verdade, não importa.

Bons estudos!

Então seria NO MATTER sempre antes de um WHAT, e DOESN'T MATTER com algum sujeito na terceira pessoa do singular?

Thanks!

Então seria NO MATTER sempre antes de um WHAT

Não. Há mais opções: no matter where, no matter how, no matter when, no matter if, etc.

DOESN'T MATTER com algum sujeito na terceira pessoa do singular

Sim. Conclusão ok.

"No matter what they say"
"It doesn't matter what they say"

Seriam as frases sinônimas?

A primeira possui mais resultados no Google, mas apesar disso a segunda possui um número bem considerável de aparições.

Uma boa resposta:

No matter and it doesn’t matter

It doesn’t matter does not mean the same as no matter. It is used to introduce a sentence that has only one clause.
It doesn’t matter what she does. (NOT No matter what she does.)
It doesn’t matter how he reacts.
Note that matter is one of those verbs that are not used in continuous forms.
Her objections don’t matter. (NOT Her objections aren’t mattering.)

Ref. englishspeaking

Porém, as frases "no matter what they say" e "it doesn't matter what they say" possuem o mesmo significado. Uma diferença? Acho que a opção com "no matter" é mais informal.

Bons estudos.

The great question is:

We've learnt that in English, there's no sentence without a subject. It's only occurs in Imperative form as in "Do it! Give me that!" and so on.
My question is: No matter what she does or It doesn't matter what she does.

By the way, It seems to be an opportunity to have a glance over the difference between a Sentence, a Phrase and a Clue!

Does anybody could help to clear it up?

Thanks
Francisco - Brazil

Creio que o correto seria "it doesn't matter what they say", pois necessita de verbo auxiliar "Do" e um sujeito "It".