有问题的时候，你可以去请教老师。

Yǒu wèntí de shíhou, nǐ kěyǐ qù qǐngjiào lǎoshī.

When you have questions, you can go ask the teacher for advice.

这个问题比较专业，我去请教一下同事。

Zhège wèntí bǐjiào zhuānyè, wǒ qù qǐngjiào yíxià tóngshì.

This question is rather technical; I'll go consult a colleague.

我想请教一下，学习汉语有什么好方法？

Wǒ xiǎng qǐngjiào yíxià, xuéxí Hànyǔ yǒu shénme hǎo fāngfǎ?

I would like to ask, what are some good ways to learn Chinese?