答案1
用于multicolumn
跨越多列的水平单元格以及multirow
跨越多行的单元格:
\documentclass[12pt,a4paper]{article}
\usepackage{multirow}
\begin{document}
\begin{tabular}{|c|c|c|}
\cline{2-3}
\multicolumn{1}{c}{} & \multicolumn{2}{|c|}{something} \\ \hline
\multirow{2}{*}{something} & something & something \\ \cline{2-3}
& something & something \\ \hline
\end{tabular}
\end{document}