5 sentences

1. 她从不跟我们打招呼。

   tā cóng bù gēn wǒ​men dǎ​zhāo​hu.

   She never says hi to us.

   Source: OpenSubtitles

2. 很抱歉我还没跟你打招呼。

   hěn bào​qiàn wǒ hái méi gēn nǐ dǎ​zhāo​hu.

   I'm so sorry I haven't said hi.

   Source: OpenSubtitles

3. 他在街上看见我，向我打招呼。

   tā zài jiē​shang kàn​jiàn wǒ, xiàng wǒ dǎ​zhāo​hu.

   He saw me on the street and said hello.

   Source: Dong Chinese Dictionary

4. 他微微欠了下身子，向推门进来的老师打招呼。

   tā wēi​wēi qiàn le xià shēn​zi, xiàng tuī mén jìn​lái de lǎo​shī dǎ​zhāo​hu.

   He leaned forward slightly to greet the teacher as they pushed the door and walked in.

   Source: Dong Chinese Dictionary

5. 出去以前，先跟他打招呼。

   chū​qù yǐ​qián, xiān gēn tā dǎ​zhāo​hu.

   Let him know before you go out.

   Source: Dong Chinese Dictionary