Because not all of them fulfill their obligation and impart deserved knowledge to us.语法错误?

问题描述:

Because not all of them fulfill their obligation and impart deserved knowledge to us.语法错误?
word说有语法错误,我找不到,急,没有钱也帮帮呗

其实.是否定句中and要用or而已吧.
另外吐槽一下楼上答题太不负责任,明明动词是impart,deserved是分词啊,在这里做形容词,
形容后面的knowledge,意思是应有的知识.