it isn't events that matter but our opinion of them 句型句子结构是什

其实这是 not.but.句型 不是.而是.
it isn't events that matter but our opinion of them
这是一个强调句型
原句是 events don't matter but our opinion of them (does)
最简单的例子 i don't study hard but you.我不用功你用功
变成强调句 it isn't i that study hard but you.