Sophia says: Check the case and number
We have already met the nominative and accusative cases, used for the subject and object. It is also important to recognise the other three cases in the singular and plural (known as number). Here are two second declension nouns as examples:
Second declension nouns – masculine (like λογος) and feminine (like νησος)
λογος (word) νησος (island) Nominative (used for the subject)
λογε νησε Vocative (used for addressing someone)
λογον νησον Accusative (used for the direct object)
λογου νησου Genitive (of…)
λογω˛ νησω˛ Dative (to…, for…; indirect object)
λογοι νησοι Nom
λογοι νησοι Voc
λογους νησους Acc
λογων νησων Gen
λογοις νησοις Dat
Remember that the definite article may also help you to determine the case and number of a noun. The case will help you to understand the function of each noun in a sentence. Look at this example:
‛η Χλοη φαινει τω˛ βατραχω˛ την αυλην.
Chloe shows the courtyard to the frog.
Although the word order is sometimes different in Greek and English, the case endings will guide you to the meaning.