"tea","coffee",可以加"s"作复数形式吗我发现英语教科书上的"tea"&"coffee"都加了"s",变成了"teas"&"coffees",我对此感到很奇怪 .请问是书本出了问题吗

tea,coffee,可以加s作复数形式吗我发现英语教科书上的tea&coffee都加了s,变成了teas&coffees,我对此感到很奇怪 .请问是书本出了问题吗 a pound of coffee half a pound of tea不可数名词前可以加the 吗?为什么?a pound of the coffee half a pound of the tea have tea可以的话 have coffee 可以吗还是必须说have a cup of coffee coffee tea or me coffee tea or me coffee tea or COFFEE OR TEA怎么样 some coffee的coffee要不要加s? Here's coffee and tea , you may either have .还是Here's coffee and tea , you may have either.还是两句都对 Here's tea and coffee.you may have each,这句话对么Here's tea and coffee.you may have either. 这两个那个对?为什么? two coffee,two tea,two COFFEE BEAN TEA LEAF怎么样 INFUSION COFFEE AND TEA怎么样 Which do you like best,coffee,tea,or lemonade?best 前面不用加 I don't like coffee.(),let's drink tea.怎么填有well nice good yes There's no coffee.Would you like a cup of tea i_____? No,thanks There’s coffee and tea; you can have ________.为什么不能用each? coffee既是CN又是UN,coffee可以写成a coffee=one cup of coffee 那tea 和 milk 行不行?tea和milk 算不算既是CN又是UN~