1 no matter + 疑問代詞/ 疑問副詞 + 主語 + 謂語動詞 （+ 其他成分）
No matter what you do, I will support you.
No matter how old you are, you can go on learning.
2 even though + 句子 （從句）,+ 句子 （主句）
Even though he is very busy today, he will come to play football with us.
I will do the work for you even though I am not quite willing to.
She should forgive herself _NO MATTER___ how awful she thought she had been
== EVEN THOUGH she thought she had been very awful, she should forgive herself.
== She should forgive herself EVEN THOUGH she thought she had been very awful.