Question

여자친구는 유대인이에요. 가장 친한 친구도 유대인이에요 In its additive meaning, -도 corresponds to 'too', 'also', or 'as well'. When used in negative expressions, -도 takes on the meaning of 'either'.

Accepted Answer

My girlfriend is Jewish. My best friend is Jewish too

Front	여자친구는 유대인이에요. 가장 친한 친구도 유대인이에요
Back	My girlfriend is Jewish. My best friend is Jewish too
Notes	In its additive meaning, -도 corresponds to 'too', 'also', or 'as well'. When used in negative expressions, -도 takes on the meaning of 'either'.

도 여자친구는 유대인이에요 가장 친한 친구도 Girlfriend Jewish