The teacher has already come. You want to talk with teacher.(合并为一句)

The teacher has already come. You want to talk with the teacher.(合并为一句）

The teacher ___ ___ you want to talk has already come.

不知道你要哪种合并方法：
The teacher has already come if you want to talk with him/her
还是
The teacher you want to talk with has already come

You want to talk with the teacher whom has already come

The teacher you want to talk with has already done.

You want to talk with the teacher who has already come 再看看别人怎么说的。