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a large amount of修饰不可数名词。a large amount of意思是“大量的”。例句：A large amount of money was spent on the bridge.这座桥花了大量的资金。
amount的用法
（一）当amount用作名词时。
1、amount 用于表示“量”“额”，如重量、金额等。
2、amount of后一般接不可数名词，有时也可接复数可数名词，此名词被视为某一“总量”或“综述”。
例句：I didn't expect the bill to come to this amount.我没料到账单达到这个金额。
（二）当amount用作动词时。
1、amount用作动词的基本意思是“合计,共计”,引申可指“等同,接近”。
2、amount是不及物动词,常与介词to连用。
例句：Her answer amounted to a complete refusal.她的答复等于是完全拒绝。
a large amount of的例句
1、You can get a large amount of information on the internet.
你可以在互联网上获得大量的信息。
2、I spent a large amount of my time on this work.
我在这项工作上花了不少时间。
3、A large amount of damage was done in a short time.
短期内造成大量损害。
4、After the rain, there is a large amount of flood in the city.
雨后，城市内涝。
5、It has a large amount of land.
它有大量的土地。
6、He has a large amount of mail to answer every day.
他每天有大量的信件要回复。