1.alotof,lotsof,plentyof等词组表示许多大量,既可以修饰可数名词也可以修饰不可数名词.比如:alotofbooks,plentyofwater.

　　2.agreatdealof,alargeamountof,alittle,little,只能修饰不可数名词.谓语动词用单数形式.例如:Alargeamountofmedicineisneededinthatarea.

　　3.agreatmany,alargenumberof,agreatnumberof,表示许多大量,可修饰可数名词复数.谓语动词用复数形式.

　　4.manya可表示许多,但做主语时谓语动词只能用单数第三人称.

　　例如:ManyascientisthasbeentryingtoresearchintotheSARSbacteria.

　　5.massesof做主语时谓语动词用复数,amassof修饰主语时谓语动词用单数.例如:Massesofworkaretobedonetowelcomethenewyear.

　　6.aquantityof,(large)quantities(of)作主语,或其所修饰的名词作主语时,其谓语动词应根据quantity的单复数形式而定.例如:Largequantitiesofmoneyareneededtoequiptheschool.

　　Aquantityofstorybookshasbeenboughtforthechildren.