"老师欢迎我们。"

Translation: The teacher welcomes us.

[Andrew-Lin]

老師歡迎我們。

[Janus159341]

It is unclear whether it should be "welcomes" or "welcomed."

[Emmanuel584464]

maybe 老师欢迎了我们

[maartendoc]

欢 (huān) = happy/joyous
迎 (yíng) = to welcome/to meet

欢迎 (huānyíng) = to welcome/welcome