推荐回答（2个）
应该是可数名词单数前必须加限定词，（具有抽象含义时除外)
如果可数名词变了复数，表示泛指时 就无须限定词 可以 单独存在
不可数名词可以单独存在
不可数名词不能加a和an，
可以加加其他 限定词
sports是名词复数
sport可以是可数名词 也可以是不可数名词
sports club，sports meeting，等都用sports而不用sport
因为 这个单词 作定语 时 常用复数 。这是规定。
状语都可以去掉而不影响句子的完整。
2.conservation is an activity only of humans。把此处的only看作是副词，修饰of humans对
一般 only 在谁前 就修饰谁
Teutonic：showing qualities considered typical of German people。 typical of German people作qualities的补足语
开头用showing而不用show 是因为词性问题 。Teutonic不是动词 所以不能用动词show解释
He came barreling down the hill and smashed into a phone booth。
barrel飞奔；疾驶；高速行驶
加ing是现在分词作状语
3.on the weekend与 in this weekend与at the weekend ，和this weekend
in the/this weekend不妥 一般直接用this weekend
on this sunday也不妥 一般直接用this sunday
因为 this weekend/ sunday 可以 起副词作用 作状语
recent years，.........单独做状语，不对
in recent years，对
in the recent years，对 但后面一般有表示范围的of短语
on recent years不对
该问题 其实与recent 无关 该词不过是作定语的形容词
its，his，their这3者都可表示：它的，
区别很明显 无需解释 their不能作名词性物主代词 也就是不能单独存在 意思也不是 它的
4.let‘s see who can ride the bull the longest。 the longest是副词最高级 作状语
副词最高级前面不是必须加the
I don’t understand the grammar，the words and the sentences in boldface，此句中的in boldface修饰的是 the grammar，the words and the sentences
因为有the
一个介词短语可以修饰其前面多个名词
根据结构 和意思 判断 其修饰的是所有的名词还是最近的那一个名词
5.SOE是国有企业的缩写，那如果给出SOE要求写全称， 需要大写，因为是专有名词
I will be back。中的back是副词做表语
不管是将来时还是过去式，谓语动词只要是系动词 后面就必须是表语
a great deal，a little bit，a bit这3者如果修饰的是动词 可看作副词做状语
6.是解释说明of growth 的 与其是同位关系 可以看做 five centuries 的 定语
absorbing是与前面 动名词 tussling 的并列成分
Hi. Yours are very good questions, worth of answering anyway, but they are too much to explain at one time. It will be of great convenience to both of us if you can divide your questions into into three or four parts .
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