3 sentences for 招呼 (zhāo​hu — inform)

1. 去之前最好先打个招呼。

   qù zhī​qián zuì hǎo xiān dǎ gè zhāo​hu.

   It's best to give them a heads-up before you go.

   Source: Dong Chinese Dictionary

2. 他只是想打个招呼。

   tā zhǐ​shì xiǎng dǎ gè zhāo​hu.

   He just wants to say hi.

   Source: OpenSubtitles

3. 她连招呼都没打。

   tā lián zhāo​hu dōu méi dǎ.

   She didn't even say hello.

   Source: OpenSubtitles