  The CMS experiment has measured the electroweak production of top quark in
different singly production modes: t-, tW- and s-channel. Recent results on
inclusive and differential cross section measurements of t-channel at 13 TeV
and of the fiducial cross section at 8 TeV are shown. The search for single top
quark production in s-channel at 7 and 8 TeV as well as the search for
associated production of Z boson and single top are presented. All measurements
are in agreement with the Standard Model prediction and no sign of new physics
is observed.
