brother
The German word 'Bruder' is used to refer to a male sibling. It is a masculine noun and its plural form is 'Brüder'. It can also be used to refer to a close male friend or a fellow member of a group, similar to the English usage of 'brother'.
My brother is very tall.
This sentence uses 'Bruder' to refer to a male sibling. 'Ist' is the third person singular form of the verb 'sein' (to be), and 'sehr groß' translates directly to 'very tall'. This is a simple sentence structure in German where the verb typically occupies the second position.
Do you have a brother?
This is an interrogative sentence asking about the existence of a male sibling. 'Hast' is the second person singular form of 'haben' (to have). The sentence structure follows the common question formation in German which has the verb at the beginning of the sentence.
My friend's brother is a doctor.
This sentence uses the related possessive phrase 'Der Bruder meines Freunds', translated as 'my friend's brother'. It is an example of how the possessive is created in German by using the genitive case. It shows the occupation 'Arzt' (doctor) of the related person.