1.Large quantities of money are spent on the subject.这个句子中要以quantities为
中心词,所以用are,如果quantities换成amounts,也把amounts看做中心词.2.*(large)quantities of 修饰可数名词复数或
不可数名词,其短语做主语时,
谓语动词典一般用复数.eg. Large quantities of food/nuts were on the table.*(large) amounts of 修饰不可数名词，其短语做主语时,谓语动词典一般用复数.eg. Large amounts of money are spent on the subject.3.*a large quantity of +名词（不可数名词或可数名词） 构成的短语做主语时，
就近原则， 谓语动词要和ＯＦ 后面的名词的数保持一致，因为短语中ＯＦ后面的名词是中心词，而其他量词是修饰语eg. A large quantity of food was on the table.A large quantity of shirts were on sale.*a large amount of + 不可数名词，的短语做主语时，谓语用单数．eg.A large number of damage was done in a very short time.4.the amount of + 不可数名词 和 the quantity of + 可数名词复数／不可数名词 的短语做主语时，谓语用单数eg. The amount of money is spent on the subject.和其用法差不多的词有numbera number of + 可数名词复数，谓语用复数．eg. A number of students have gone to the library.the number of + 可数名词复数，谓语用单数．