单数句变复数句的5大规则是什么?(单数变复数口诀)

1.人称代词主格单数变成相应的人称代词主格复数,即I→we;you→you;she,he,it→they
2.am,is 变为 are.如:I'm a student.→We are students
3.不定冠词 a,an 要去掉固定搭配除外.如:He is a boy.→ They are boys.
4.可数名词单数要变为复数形式.如:It is a cat.→They are cats
5.指示代词 this,that 变为 these,those.如:This is a book.→ These are books.