buy
The German word 'kaufen' is the infinitive form of the verb 'to buy'. It is a regular verb in German and is used in the same way as 'buy' in English. For example, 'Ich kaufe ein Buch' means 'I buy a book'.
I want to buy a book.
This is an example of a simple sentence stating a desire to make a purchase. 'Ich möchte' translates to 'I want to', and 'ein Buch' is 'a book'.
Can you help me buy a car?
This sentence is asking for assistance in making a purchase. 'Können Sie mir helfen' translates to 'Can you help me', and 'ein Auto zu kaufen' is 'to buy a car'. The infinitive 'kaufen' ('to buy') is moved to the end of the phrase due to the German sentence structure.
He does not want to buy apples.
This sentence is expressing a lack of desire to make a specific purchase. 'Er will' translates to 'He wants', 'keine' is 'no/not any', 'Äpfel' is 'apples', and 'kaufen' is 'to buy'. The use of 'keine' negates the desire to buy.