It sells at two dollars the pound.

It sells 16 dollars to the pound.

John is paid by the hour.

⑧下列结构中的冠词。

-have+the+抽象名词+to do sth = be so +adj+ as to do sth

如：He has the politeness/kindness to say hello to me.

=He is so polite/kind as to say hello to me.

不用冠词的场合

抽象、物质、专有名，代词基数用作限定；

泛指节假季节星期几，球棋、呼语与餐名；

刊物、公告与标题，普通名词并列紧相邻；

唯一职位，学科与语种，洲、国、省、市、县街路名。

上述口诀用心牢记，并结合下列说明予以理解

①抽象、物质名词和专有名词一般无冠词，但物质名词、抽象名词具体化，或专有名词泛指时，常用不定冠词，例：

a Mr Wang/a climb/a swim.

for a while/in a hurry/a fire Here is a life of struggle.

Physics is a science. There was a heavy rain last night.等抽象名词受of短语修饰或上下文已予限定，用the.

如：the science of speech sounds 语音学

the music of the film, do me the favor to do sth.

②代数词、基数词作前置定词，不用冠词。

③泛指的节假日、季节、星期前不用冠词。但是季节名词表特定时间或受of知识修饰时用the.如：in the winter of 1948。

有时泛指时间用a+adj+名词。如：have a hot summer.

④餐名前一般无冠词。但餐名受adj修饰时常常有a(an).特指时用the.

如：have a good supper. The breakfast was well cooked.

dinner表“宴会”时，是可数名词，有各种冠词修饰give a dinner to them.

⑤普通名词并列时不用冠词

soul and heart/husband and wife/day after day/arm in arm/hand in hand.

⑥语种前不用冠词。但the English结构用the。

What's the English for labour.

The English of shakespear.

作限定时用the.

⑦广场、公园、学校、建筑物等专有名词，由“专有名词+普通名词”构成时不用冠词。但the University of Beijing结构和the Beijing station中用the.

动词形式的变化

动词根本是原形，

变化形式有四种：

原形词尾加“s”，

现在第三单人称；