the whi\ole class went on atrip ,(包括）the twins.这里的包是include还是including,为什么?

the whi\ole class went on atrip ,(包括）the twins.
这里的包是include还是including,为什么?

including 现在分词引导壮语

including the twins .including这里是介词包括 including them
including us including him including me