misunderstanding实际使用中可数不可数都有。如:
Many a quarrel as come about through a misunderstanding.
许多争执都是由于误会产生的。
He put the dispute down to some misunderstanding.
他把争论归因于某种误会。
Their misunderstandings were ironed out after a long talk.
经过长时间的交谈,他们之间的误会已经消除
就本题而言,如果看做可数,句中misunderstanding要加s;如果看做不可数,则exist要加s改为第三人称单数。
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