customizing gb4e subexamples (not about cross-reference)

Question

I'm using the gb4e for labeling examples in a semantic paper. The examples come with a specific context, and I want to mention that under this specific context, there are at least 2 felicitous answers. What I want is sth like:

(36) Context: It's raining outside.

A: It's a really nice weather today. --> instead of a.

B: Yes, you are right. --> instead of b.

B': Yes, but it is so hot. --> instead of c.

B'': No, you are wrong. --> instead of d.

(no spaces among these subexamples)

I understand by using other packages, e.g. linguex I can resolve the problem, but I was wondering if I can change any setting in the gb4e package to continue using it.

Thanks so much!

Here is the MWE (Sorry if the format looks terrible):

    \documentclass[12pt]{article}
     \usepackage{gb4e}
    \begin{exe}
    \ex Context: It's raining outside. 
    \begin{xlist}
    \ex[A:] It's a really nice weather today. 
    \ex[B:] Yes, you are right.
    \ex[B':] Yes, but it is so hot.
    \ex[B'':] No, you are wrong.
    \end{xlist}
    \end{exe}
    \end{document}

Answer 1

If you're going to be doing this a lot, I would create a modified version of the gb4e \exi command to line up everything properly. I've called this \exk, and its corresponding \sn version, \snk. This is preferable to redefining \exi itself.

\documentclass{article}
\usepackage{gb4e}
\makeatletter
\newcommand\exk[1]{\item[{\makebox[1.5em][l]{#1}}]\@ifnextchar [{\@exj}{}}
\newcommand\snk{\exk{}}
\makeatother
\begin{document}
\begin{exe}
\ex Context: It’s raining outside.
\begin{xlist}
\exk{A:}{It's a really nice weather today.}
\exk{B:}{Yes, you are right.}
\exk{B’:}{Yes, but it is so hot.}
\exk{B’’:}{No, you are wrong.}
\snk{Some example}
\end{xlist}
\end{exe}
\end{document}

Answer 2

For providing custom example identifiers you can use \exi{<identifier>}, as explained in Section 1.2 (page 4) of the gb4e manual. Identifiers are not left aligned by default, so you could consider using B₀, B₁, B₂ to make them all the same width (although in linguistics most people probably use the prime notation).

MWE:

\documentclass[12pt]{article}
\usepackage{gb4e}
\begin{document}
\begin{exe}
\ex Context: It's raining outside. 
\begin{xlist}
\exi{A:} It's a really nice weather today. 
\exi{B:} Yes, you are right.
\exi{B':} Yes, but it is so hot.
\exi{B'':} No, you are wrong.
\end{xlist}
\end{exe}
\end{document}

Result: