wǔ / dǎo / kè / shàng / lǎo / shī / xiān / jiāo / wǒ / men / rú / hé / ān / quán / de / pǐ / chà舞蹈课上,老师先教我们如何安全地劈叉。In dance class, the teacher first taught us how to do the splits safely.