柯林斯詞典is /?z/ 1. Is is the third person singular of the present tense of . Is is often added to other words and shortened to -'s. (be)的第三人稱單數現在時2. the INTERNET DOMAIN NAME for Iceland 冰島 返回 is劍橋詞典he/she/it form of be （he、she或it 做主語時be 的形式） 范例 The surname 'Smith' is very common in Britain .This machine is easy to use.Salt is a compound of sodium and chlorine .This is your room - it is rather small , I'm afraid .Grandfather gets quite confused sometimes, and doesn't even know what day it is. 返回 is