he really pitched in on the housework 这里的on可不可以去掉?为什么要不直接pitch in the housework?
问题描述：
he really pitched in on the housework 这里的on可不可以去掉?为什么要不直接pitch in the housework?
答
不可以去掉 on.
on,这里需要才有意思.(英文的习惯用语)