How do you say thank very much teacher in Chinese?

There are a few ways to say "Thank you very much, teacher" in Chinese, depending on the level of formality you want to use:

Formal:

* 老师，非常感谢您！ (Lǎoshī, fēicháng gǎnxiè nín!) - This is the most formal way to express gratitude to a teacher. It literally translates to "Teacher, thank you very much!"

* 老师，谢谢您！ (Lǎoshī, xièxie nín!) - This is slightly less formal than the previous phrase, but still very respectful. It translates to "Teacher, thank you!"

Informal:

* 老师，谢谢您！ (Lǎoshī, xièxie nín!) - This is the most common way to express gratitude to a teacher, and it is suitable for most situations.

* 老师，谢谢！ (Lǎoshī, xièxie!) - This is even more informal than the previous phrase, and it can be used with teachers you know well.

Note: The word "您" (nín) is used as a polite form of "you" when addressing someone older or in a position of authority, like a teacher.

You can also add other phrases to express your appreciation, such as:

* 您辛苦了！ (Nín xīnkǔ le!) - You worked hard!

* 您的帮助对我很有帮助。 (Nín de bāngzhù duì wǒ hěn yǒu bāngzhù.) - Your help was very helpful to me.

* 我真的很感激您。 (Wǒ zhēn de hěn gǎnjī nín.) - I'm really grateful to you.

Remember to choose the appropriate phrase based on your relationship with the teacher and the situation.