I have learned many valuable things from the lessons before. Here are some sentences that are quite important to understand:
1. Anna and her brother are cheerful because the weather is sunny.
Noun: Anna, brother, weather
Pronoun: her, they
Conjunction: and, because
Adjectives: cheerful, sunny
2. In the morning, he walks to school.
Noun: morning, school
Pronoun: he
Prepositions: In, to
Verb: walks
Articles: the