A fishing boat is tied up at the pier on Ios.

Learning Greek

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Prepositions

Prepositions generally take the objective case. It seems that you could get by pretty well with just six of them.

από = from, of
σε = to, at, in, on
προς = toward
με = with, by
χωρίς = without
για = for, about, concerning

Note that σε can merge with τον, την, το, τους, τις, τα,
forming στον, στην, στο, στους, στις, στα.

Η Αθηνά δίνει νερό στον σκύλο.
Athena gives water to the dog.

Πίνω κρασί με το τυρί μου.
I drink wine with my cheese.

Αυτό το πλοίο πηγαίνει από την Αθήνα προς τη Νάξο.
This ship goes from Athens toward Naxos.

Other prepositions include:
κοντά = near
Είμαι μέσα. = I am inside.
Είμαι έξω = I am outside.
Ο σκύλος είναι ανάμεσά σε μας. = The dog is between or among us.
Είσαι δίπλα μου = You are next to me.
Είναι άντρες, σαν εμάς. = They are men like us.
κίτρινο όπως ένα λεμόνι = yellow like a lemon
εξαιτίας σου = because of you.
λόγω = because of
Όπως θες. = As you want.
Δουλεύω ως παπάς. = I work as a doctor.
πάνω = on top of
πάνω στη σοφίτα = up in the attic
κάτω από = under
κάτω στο = down to
Γιατί πηγαίνεις κάτω στο υπόγειο; = Why do you go down to the basement?
πίσω από = behind
Τα βάζει πίσω στο ράφι. = She puts them back on the shelf.
πριν από = before
μετά από = after
μέχρι = until
και μετά = and then
κατά = against, opposed to
εναντίον = against, opposed to
αντί για = instead of
εκτός από = except for
εν τω μεταξύ = meanwhile

See also prepositions in space and time.