also
The word 'auch' in German is used to mean 'also' or 'too'. It is often used to add an additional point or to express agreement. For example, 'Ich mag Kaffee, ich trinke auch Tee.' means 'I like coffee, I also drink tea.'. It can also be used to express surprise or to emphasize a point, as in 'Auch du bist hier?' meaning 'You are also here?'.
I also like apples.
In this sentence, 'auch' is used to indicate 'also' or 'too'. It is expressing agreement with a previously stated preference for apples.
She has time too.
'Auch' is used here to mean 'too' or 'as well'. This sentence implies that, like someone else, she also has time.
He is here too.
In this case, 'auch' is being used to express the addition of somebody else present in the location: 'too' or 'also'. The person speaking is stating that in addition to other people, he is present too.