Grammar Info
N5 Lesson 1: 4/12

Also, Too, As well, Even, Either, Neither

も's translation will change, depending on if the sentence is positive, or negative

Structure
Noun +
Details
Part of Speech Particle
Word Type Linking Particle
Register Standard
品詞 助詞
単語の種類 係助詞
使用域 一般
Information
can mean 'too/also', or 'even', or 'neither/either', depending on if the sentence is affirmative or negative. Multiple meanings like this are quite common for Japanese particles, as there is no need to use different words simply to agree with other statements in the sentence (unlike English).
  • 私(わたし)、先生(せんせい)です
    I am a teacher.
  • 私(わたし)先生(せんせい)です
    I'm also a teacher.
As you can see here, English requires 'either/neither (when negative)', or 'too/also', but Japanese only requires . You can think of it as simply meaning 'Whatever is true for (A), is also true for (B)'.
is part of many other grammar structures in which it keeps its original meaning, but shifts the nuance a little bit. Some of these include でも, にも~ない, とも. As we can see, it is frequently paired with other particles!
  • 車(くるま)早(はや)い、で危(あぶ)ない。
    Cars are fast, but dangerous.
Here, can be seen pairing with . This suggests that 'With (A), (B) also'. This is regularly translated simply as 'but' in English.
Slow Male
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あなたトムです
You are also Tom.
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私(わたし)
Me too.
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彼(かれ)先生(せんせい)です
He is also a teacher.
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Books
Genki I
Page 37
Genki I
Page 81
Genki I 2nd Edition
Page 65
Genki I 2nd Edition
Page 111
A Dictionary of Basic Japanese Grammar
Page 247
みんなの日本語 I
Page 14 [CH 1]
Tae Kim's Japanese Grammar Guide
Page 35