Updated daily. Please follow me so that I can follow you.“An” is used before “FYI” because it is pronounced /ˌefˌwaɪˈaɪ/ and so the first sound is /e/, a vowel sound.
一、当冠词后面的单词音标的首个音素是辅音的时候,不定冠词要用a,例如:a book [bʊk] 一本书a dog [dɒɡ] 一条狗a girl [ɡɜːl] 一个女孩二、当冠词后面的单词音标的首个音素是元音的时候,不定冠词要用 an,例如:an apple [ˈæpl] 有个苹
*am / is / are表达的意思是“是”,用在人或物的后面。变问句,be提前,句尾问号要配全。应用时多注意缩写形式要牢记:I'm=I am。you're=you are。he's=he is she's=she is it's=it is。we're=we are you're=you are they're=they are ...