不是

búshì

phrase #4,942

Meanings

Zhè búshì wǒ de shū.

This is not my book.

Tā shuō de búshì zhēn de.

What he said isn't true.

Zhè dōu shì wǒ de búshì.

This is all my fault.

grammar

不是 can also be used as a noun meaning 'fault/blame': 这是你的不是 (This is your fault). The pattern 不是...就是... means 'if not... then...'.

mistakes

The tone of 不 changes before a 4th-tone syllable: 不(bù) + 是(shì) = búshì (2nd tone + 4th tone).

不 bù

是 shì