英譯三人行必有吾師?

..............one's 

Three people walking together,there must be at least one person to learn from.

When three are walking together, I am sure to find teachers among them.

Three people, there must be my teacher

Among them must be one super
ior than the other three people.

Within a group of ‘3’ people, there must be one who is wise enough for me to learn from.

This is a translation of intent of the original proverb.

Three people walk together have one teacher

When have 3 people walk together , when have one teacher

When three walk together, there must be one who can teach me.

三人行，必有我師焉。擇其善者而從之，其不善者而改之。
When three are walking together, I am sure to find teachers among them. I will select their good qualities and follow them, their bad qualities and avoid them.