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主句主语是 most of the changes
that companies make是定语从句修饰主句主语the changes
are是主句谓语 由于主句主语是复数 所以谓语夜用复数are
make 是从句里的谓语 和主句谓语are 不相干
Moreover, most of the changes are intended to keep them profitable.
子句-2
Companies make the change.
子句-3
This need not always mean increasing productivity.
子句-4
Switching to new markets or improving quality can matter just as much.
3. 句子成分
子句-1
Moreover, [状语] most of [定语] the changes [主语] are intended to keep [谓语] them [宾语] profitable. [宾语补足语]

子句-2
Companies [主语] make [谓语] the change. [宾语]

子句-3
This need [主语] not always mean [谓语] increasing productivity. [宾语]

子句-4
Switching to new markets [主语] or [连接词] improving quality [主语] can matter [谓语] just as much. [状语]
Moreover, most of the changes that companies make are intended to keep them profitable, and this need not always mean increasing productivity: switching to new markets or improving quality can matter just as much.
另外，公司的大部分改革以赢利为目的，而达到赢利的目的不一定总是要提高生产力：转入新的市场或改善产品质量也可以达到同样的效果。