Subject MaterialTo Do-Auxiliary VerbWatch this video clip (1:08 min.) to learn more about "to do" as an auxiliary verb.CC BY-SAVideo: Knut Inge Skifjeld, Anne Scott HagenCC BY-SAWritten by: Anne Scott Hagen and Knut Inge Skifjeld. Rightsholder: AmendorLast revised date 09/03/2013Cite or use