\starttext

\def\ActionY{\blank\inleftmargin{\shownofparlines}}
\def\ActionN      {\inleftmargin{\shownofparlines}}

\saveparnumber\checknofparlines\ifnum\nofparlines<2 \ActionY\else\ActionN\fi 1.1 nop \crlf
                                                                             1.2 nop \par
\saveparnumber\checknofparlines\ifnum\nofparlines<2 \ActionY\else\ActionN\fi 2.1 nop \par
\saveparnumber\checknofparlines\ifnum\nofparlines<2 \ActionY\else\ActionN\fi 3.1 yes \crlf
                                                                             3.2 nop \crlf
                                                                             3.3 nop \par
\saveparnumber\checknofparlines\ifnum\nofparlines<2 \ActionY\else\ActionN\fi 4.1 nop \crlf
                                                                             4.2 nop \par
\saveparnumber\checknofparlines\ifnum\nofparlines<2 \ActionY\else\ActionN\fi 5.1 nop \par
\saveparnumber\checknofparlines\ifnum\nofparlines<2 \ActionY\else\ActionN\fi 6.1 yes \par

\stoptext
