Clauses with "no matter"...

No matter what everyone anyone says, I will use this method to learn/for learning foreign languages.
No matter what he has done/did, I will always will look up to him. He has done made important discoveries.
No matter whom/who  (these days the rules for who/whom have been relaxed, and 'natural sounding speech' allows it) they asked, the answer is was (to match the tense of 'asked') the same.
No matter how (bad) (some adjective is required after this 'how') the situation is, she is always happy.
No matter how much the coffee I drink, I can't to stay awake.
No matter what problems arise the reason, you must be there on time.
No matter how much the new smartphones cost, you have to buy one.
No matter where the new restaurant is, we going to visit it them next week.

Clauses with "no matter"...

No matter what everyone says, I will use this method to learn a foreign language.
No matter what he has done, I always will look up him. He has discovered important things.
No matter whom they asked, the answer was the same.
No matter what the situation is, she is always happy.
No matter how much coffee I drink, I can't stay awake.
No matter what the reason, you must be there on time.
No matter how much the new smartphone costs, you have to buy one.
No matter where the new restaurant is, we are going to it next week.