7 sentences

1. 他20年前才开始存在。

   tā20 nián​qián cái kāi​shǐ cún​zài.

   He only began to exist 20 years ago.

   Source: OpenSubtitles

2. 那是4年前的事了。

   nà shì4 nián​qián de shì le.

   That was four years ago.

   Source: OpenSubtitles

3. 我在30年前来过一次。

   wǒ zài30 nián​qián lái guo yī cì.

   I was here once, 30 years ago.

   Source: OpenSubtitles

4. 29年前我出生在这里。

   29 nián​qián wǒ chū​shēng zài zhè​lǐ.

   I was born here 29 years ago.

   Source: OpenSubtitles

5. 你妈妈和我35年前生了你。

   nǐ mā​ma hé wǒ35 nián​qián shēng le nǐ.

   Your mother and I had you 35 years ago.

   Source: OpenSubtitles

6. 那些菊花是我们15年前种的。

   nà​xiē jú​huā shì wǒ​men15 nián​qián zhòng de.

   We planted those chrysanthemums 15 years ago.

   Source: OpenSubtitles

7. 年前家家户户都要大扫除。

   nián​qián jiā​jiā​hù​hù dōu yào dà​sǎo​chú.

   Every household does a thorough cleaning before the New Year.

   Source: Dong Chinese Dictionary