3 sentences

1. 你无缘无故地吻了我。

   nǐ wú​yuán​wú​gù de wěn le wǒ.

   You kissed me for no reason.

   Source: CCMatrix

2. 没有人无缘无故地做某事。

   méi​yǒu​rén wú​yuán​wú​gù de zuò mǒu​shì.

   No one does anything without a reason.

   Source: CCMatrix

3. 为什么有的人会无缘无故地生气？

   wèi​shén​me yǒu​de rén huì wú​yuán​wú​gù de shēng qì?

   Why do some people get angry for no reason?

   Source: CCMatrix