a/数词+单位词+of+不可数名词”结构
单位词可为单数或者复数
a cup of tea two pieces of paper
不确切
数量
当表达大概、极少、不确定的数量时
little,a little,much,a bit of, most
litter time a lot of food
名词在句子中成分
名词作定语:
1.一般用单数形式,country music;many story books.
2.名词man,woman作定语时,其单复数形式要与后面所修饰的名词保持一致;
a woman teacher, two men works.
3.“数量词+名词”作定语,中间有连字符,名词用单数.
He took a five-minute break.