2 sentences for 师姐 (shī​jiě)

1. 她是我的师姐，比我高一个年级。

   tā shì wǒ de shī​jiě, bǐ wǒ gāo yī gè nián​jí.

   She is my senior fellow student, one grade ahead of me.

   Source: Dong Chinese Dictionary

2. 老师的女儿比我大三岁，我得叫她师姐。

   lǎo​shī de nǚ'ér bǐ wǒ dà sān suì, wǒ děi jiào tā shī​jiě.

   The teacher's daughter is three years older than me, so I have to call her 'shijie'.

   Source: Dong Chinese Dictionary