Put two sentences into one. 1)tell me something. how fast do you ski? 2)tell me something. how popular is this festival? 3)tell me something. how often does he go to the skating rink? 4)tell me something. how well do your friends speak english?

tell me how fast you ski.
tell me how popular this festival is.
tell me how often he goes to the skating rink.
tell me how well your friends speak English.