为什么是an important xxx?还有那些开头是i的前面加an的单词（形容词也行

为什么是an important xxx?还有那些开头是i的前面加an的单词（形容词也行 为什么是someone important而不是important someone 为什么是 anything important 而不是 important anything 什么是Hacked by xxx an NBA basketball game为什么是“an”? rainforests are very important to us .为什么是用 to 英语翻译翻译：为什么是These words are important.而不是These sentences are important? American English is a most important language.为什么是a不是the most important plays an important doing sth is important为什么是DOING?arriving at the airport early is important.studying english is important为什么是doing arrive at the airport 不行吗 an hour的不定冠词为什么是an为什么是AN不是A 1、when we travelled in Canada ,my cousin __________ as our guide .为什么选served不选performed呢？2、In modern times information technology ________ in our daily life .为什么是plays an important part 不是 is playing an important part 为什么是A UFO而不是an UFO? 为什么是a unique opportunity 而不是an 为什么是an uncle和a university? honest 前面不定冠词为什么是an? 为什么是an adult不是a adult? 请以An important person in My life为题写一篇作文.3请以An important person in My life为题写一篇作文.30词就行