在英语中,"is" 和 "are" 都是表示"是"的动词,但是它们的用法却有所不同。
"Is" 是用于单数主语,例如 "He is a teacher","She is a doctor","It is a book" 等等。
而 "Are" 是用于复数主语,例如 "They are students","We are friends","These are pens" 等等。
此外,"is" 还可以用于现在进行时,表示正在发生的动作,例如 "He is running","She is eating","They are playing" 等等。
而 "are" 也可以用于现在进行时,例如 "They are working","We are studying","You are reading" 等等。
除了表示"是"的用法,"is" 还可以用于形容词的比较级和最高级,例如 "She is taller than him","This is the biggest cake I have ever seen" 等等。
总之,"is" 和 "are" 都是非常基础的英语单词,但是它们的用法要注意区分。希望本文能够帮助大家更好地理解和使用英语。