不定冠词a/an用法小结
1、第一次提到某人或某物时
eg:Doyouwantanotebook?/Thisisanapple.
2、用在序数词前表示“又一,再一”
eg:Theteachersanghimasecondsong./Tomtriedasecondtime.
3、当名词被such,half,what修饰时,不定冠词放在这些词的后面
eg:suchanicegirl,halfanhour,whata/an…
4、当名词前面的形容词之前有so,how时,不定冠词a,an要后置
eg:Heissogoodaboythatheoftenhelpsothers.
Howredanappleitis.
5、当名词前有形容词和quite,very,rather时,不定冠词a,an置于quite和rather之后,very之前
eg:quiteagoodboy,averymovingmovie,ratheracoldday