knowing some table manners ( ) important for us 是用is 还是用are

问题描述:

knowing some table manners ( ) important for us 是用is 还是用are

你好,这里应该用is.因为这句话的主语是knowing some table manners这件事,而不仅仅指manners.而knowing some table manners这件事如果把它换成一个代词,可以用it.这样这句话就变成:it ( ) important for us,很容易...