Google translate could've helped with this, but oh well... This is correct grammar. Sidenote: Instead of saying DO NOT, you could just say don't so it ends up easier like this:
1. Yo espero que tú hables español. 2. Espero regresar temprano. 3. Pienso queesun buen hombre. 4. No creo quevengatemprano. 5. Es nesesario quevuelvaspronto.
