What do you do for a living?为什么what后面还会有一个do,做助动词么,但是后面已经有一个动词do了啊

what do you do for living?还是what do you do for a living? what do you do 和 what do you do for a living 意思是不是差不多 what do you do for a-----(live)----fishing What do you do for Spring Festival? what do you usually do for fun what do you do for fun? what do you do for your life? What do you do for it?是什么意思 what do you do for exercise?意思 what do you do ( ) Spring Festinal?what do you do ( ) Spring Festinal?A.to B.at C.for D.in What do you look for in a friend? do you know what he did for a ------[live] I Never Told You What I Do for a Living What do you look for in a robot? what do you plan on doing for a what elements do you consider when looking for a job? What do you have ____ summer?A in B for What do you need for a good life?