She brought us three coffees. 她給我們端來三杯咖啡。不應該是
she brought us three cups of coffee
She brought us three coffees.=She brought us three cups of coffee. 但前面一句的 coffee為可數名詞,意思是“一杯咖啡”;后面一句的coffee為不可數名詞,意為“咖啡”。