Also/Too (도)

The particle 도 means 'also,' 'too,' or 'as well.' It is used to add something to what has already been stated. An important feature of 도 is that it replaces other particles like 은/는, 이/가, and 을/를 — you do not stack them together.

For example, if someone says '저는 학생이에요' (I am a student), you can respond '저도 학생이에요' (I am also a student). Here, 도 replaces 는. Similarly, '커피를 좋아해요. 차도 좋아해요.' (I like coffee. I also like tea.) — 도 replaces 를.

However, 도 does not replace location particles like 에 or 에서. Instead, it attaches after them: '학교에도 가요' (I go to school, too). This is a common area of confusion for beginners.