定冠詞和不定冠詞的主要用法區(qū)別
1.There is a rabbit under the tree.The rabbit is eating a carrot.第一次提到某物,用不定冠詞,再次提到相同的事物,用定冠詞
2.Who is your best friend in the company?雖然第一次提到,但是說話雙方都知道的那個company.
3.Bill Gates is the richest man in the world.形容詞或副詞最高級前一定要用the.如果a,an和最高級連用,意思就變了：Bill Gates is a richest man in the world.比爾蓋茨是世界上最有錢的人之一.
表示某一類事物時,可以用定冠詞,不定冠詞和復數(shù)三種形式表達 比如：The elephant is a friendly animal.An elephant is a friendly animal.Elephants are a friendly animal.注意：單數(shù)可數(shù)名詞前一定要用冠詞,無論名詞前有多少修飾語 比如：My mother is a kind,generous,optimistic,open-minded,and honest person