documentclass[12pt,a4paper,sans]{moderncv}

moderncvtheme[green]{classic}
usepackage[utf8]{inputenc}
usepackage[scale=0.8]{geometry}

firstname{Ice}
familyname{Rabbit}
title{curriculum vitae}

begin{document}
begin{center}
makecvtitle
end{center}

section{Education}
cventry{2011 -- 2014}{Master Penguin science}{University of Queen Maud Land}{Antarctica}{}{More learning about penguin behaviour in Antarctica.}

cventry{2012}{Internship}{University of Ellesmere Island}{Nunavut, Canada}{}{Internship assignment. The goal was to find penguins in the Canadian Arctic.}

cventry{2006 -- 2011}{Bachelor Penguin science}{University of Queen Maud Land}{Antarctica}{}{Learning about penguin behaviour.}

end{document}

newcommand*{subcventry}[7][.25em]{%
  cvitem[#1]{#2}{%
    {hspace*{1em}bfseries#3}%
    ifthenelse{equal{#4}{}}{}{, {slshape#4}}%
    ifthenelse{equal{#5}{}}{}{, #5}%
    ifthenelse{equal{#6}{}}{}{, #6}%
    .strut%
    ifx&#7&%
      else{newline{}hspace*{1em}begin{minipage}[t]{dimexprlinewidth-1em}small#7end{minipage}}fi}}

documentclass[12pt,a4paper,sans]{moderncv}

moderncvtheme[green]{classic}
usepackage[utf8]{inputenc}
usepackage[scale=0.8]{geometry}

firstname{Ice}
familyname{Rabbit}
title{curriculum vitae}

newcommand*{subcventry}[7][.25em]{%
  cvitem[#1]{#2}{%
    {hspace*{1em}bfseries#3}%
    ifthenelse{equal{#4}{}}{}{, {slshape#4}}%
    ifthenelse{equal{#5}{}}{}{, #5}%
    ifthenelse{equal{#6}{}}{}{, #6}%
    .strut%
    ifx&#7&%
      else{newline{}hspace*{1em}begin{minipage}[t]{dimexprlinewidth-1em}small#7end{minipage}}fi}}


begin{document}
begin{center}
makecvtitle
end{center}

section{Education}
cventry{2011 -- 2014}{Master Penguin science}{University of Queen Maud Land}{Antarctica}{}{More learning about penguin behaviour in Antarctica.}

subcventry{2012}{Internship}{University of Ellesmere Island}{Nunavut, Canada}{}{Internship assignment. The goal was to find penguins in the Canadian Arctic.}

cventry{2006 -- 2011}{Bachelor Penguin science}{University of Queen Maud Land}{Antarctica}{}{Learning about penguin behaviour.}

end{document}

documentclass[12pt,a4paper,sans]{moderncv}

moderncvtheme[green]{classic}
usepackage[utf8]{inputenc}
usepackage[scale=0.8]{geometry}
usepackage{enumitem}
firstname{Ice}
familyname{Rabbit}
title{curriculum vitae}

setlist[itemize]{leftmargin=*,align=left,nosep,labelsep=0.5cm}

newcommand*{ccvline}[4]{
cvline{#1}{
vspace{-3mm}
begin{itemize}[label=$$]
item  {bfseries #2} {slshape #3} {small #4}
end{itemize}
vspace{-3mm}}
}

begin{document}
begin{center}
makecvtitle
end{center}

section{Education}
cventry{2011 -- 2014}{Master Penguin science}{University of Queen Maud Land}{Antarctica}{}{More learning about penguin behaviour in Antarctica.}
ccvline{2012}{Internship}{University of Ellesmere Island, Nunavut, Canada.newline}{Internship assignment. The goal was to find penguins in the Canadian Arctic.}
cventry{2006 -- 2011}{Bachelor Penguin science}{University of Queen Maud Land}{Antarctica}{}{Learning about penguin behaviour.}

end{document}