To Do-Auxiliary Verb
Watch this video clip (1:08 min.) to learn more about "to do" as an auxiliary verb.
Video: Knut Inge Skifjeld, Anne Scott Hagen / CC BY-SA
CC BY-SAWritten by: Anne Scott Hagen and Knut Inge Skifjeld. Rightsholder: Amendor
Last revised date 09/03/2013