Usages of er
btw. you can't use it in the word 'essen'. because the 2 s are not in the same syllable. You say 'es- sen'.
if you add a time expression before this phrase, the two words change order. Isn't German a fun language:D
Er geht.- He goes.
Dann geht er. - Then he goes.
Morgens geht er.- In the morning he goes.
in der Firma
in der Kantine
Accusative is the case of movement towards a direction.
an einen kleinen Tisch
He is moving into a sitting position at the table.
Don't worry at this stage too much about the forms. We will tackle that later, but try to grasp the idea of when to use the accusative.
an einem kleinen Tisch
When we want to describe a location, we use prepositions followed by a dative.
in einem Café
an einem Tisch
It would be a different case if we said:
He sits down in the corner.
In this case we would have a movement into the corner. >Accusative
Er setzt sich in die Ecke.
Er lächelt zu ihr hinüber.
between the direct and the indirect object
Der traurige Mann geht zur Arbeit zurück.