This is an alarm clock 为什么要用an?

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Thisisanalarmclock为什么要用an?Thisisanalarmclock为什么要用an?Thisisanalarmclock为什么要用an?alarm　clock　闹钟,其实alarm

This is an alarm clock 为什么要用an?
This is an alarm clock 为什么要用an?

This is an alarm clock 为什么要用an?
alarm　clock　闹钟,其实alarm的第一个发音为元音,
所以前面要用冠词an,
如　　an apple,an orange

alarm clock是个名词
所以前面需要冠词
而alarm是元音发音开头
所以需要用an而不是a
望采纳~

This is an alarm clock 为什么要用an? where is ( ) alarm clock?A an B a C the D this The alarm clock is an a____ invention. an alarm an.alarm. an alarm dresser,an,clock,the,there,is,on,alarm(.) There is —(a /an )alarm clock on the table . there is an alarm clock on the table.改为复数 This is a alarm clock 这个句子哪里错了?.. Is this an egg? this is an easy this is an Is this an eye? Is this an umbrella this is an Under the table is an alarm clock的同义句是什么? Where is the alarm clock?