#每天学英语#
a (用于可数名词或单数名词前，表示未曾提到的)一(人、事、物)；用于前有形容词或后有短语的不可数名词前；任何一；每一习语①from A to B
从一地到另一地 from one place to another
句子：For me a car is just a means of getting from A to B.
在我看来，汽车只不过是从一地到另一地的代步工具。
②from A to Z
从头到尾；彻底地；完全 including everything there is to know about sth
He knew his subject from A to Z.
他通晓自己的学科。
2. an
(指初次提及或非特指的人或物)一(个)；(一类人或事物中非特指的)任何一(个)；(用于前加形容词或后加修饰语的不可数名词之前)一(种)
句子:
a (an) indef. art. 一个
通常用于单数可数名词之前，泛指某类人或事物中的一个。
①My friend needs a bilingualdictionary.
我的朋友需要一本双语词典。
②Would you like a sandwich?
要来份三明治吗？
③There is a bird sitting in the tree.
树上卧着一只鸟。
3.apple 苹果
句子：
①I want an apple.
我想要一个苹果。
②Penny"s only son was the apple of her eye.
彭妮的独子是她的心肝宝贝。
n.
the apple doesn"t fall/never falls far from the tree
( saying, especially NAmE ) 有什么样的父母就有什么样的儿女；上行下效
a child usually behaves in a similar way to his or her parent(s)
①the apple of sb"s eye
心肝宝贝；掌上明珠
a person or thing that is loved more than any other
②apples and oranges
( NAmE ) 苹果橘子两码事；截然不同 used to describe a situation in which two people or things are completely different from each other
③They really are apples and oranges.
他们确实是迥然不同。
④as American as apple pie
典型美国式的；地道美国式的 used to say that sth is typical of America
⑤a rotten apple
带来恶劣影响的人；害群之马 one bad person who has a bad effect on others in a group
