Correção de frases: "the people must", "I don't...''

Good morning!
Please, Are these sentences right? I have some doubts about them
1- The people must be 16 years old to drive in our country.
2- Excuse-me! I don´t came to English classes last because I got up late. Actually, I work from 10:40 p.m. to 06:00 a.m.

I would like if you can help me to correct these sentences.
Thanks very much!
MENSAGEM PATROCINADA Para aprender mais sobre os Tempos Verbais baixe agora o: Guia Grátis de Tempos Verbais em Inglês. Ele contém um resumo bem estruturado para revisar os conceitos que você aprendeu na escola.

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Avatar do usuário Artful Dodger 4500 6 13 103
1 - People must be 16 years old to drive in our country.
2 - I'm sorry, I didn't come to last English class because I got up late. In fact, I work from 10:40 PM to 6 AM.

Cheers!