one boat • boats/ s /• ts/ ts/ a car• two cars/ z / a bus•buses/׀z / five birds/ z / ds/ dz/• a bird /one bird six books/ s /• one/a book trees is--- are this---these it ---they • bananas /z / buses /iz/ boxes /iz/ oranges /iz/ apples /z/ bags /z/ books /s/ pens /z/ birds /z/ What is this? It is a book.• What are these ? They are books. • 名词复数顺口溜 • 名词复数多又多，要变复数有口诀。• 一般情况 + s ， 特殊情况不太多。s,x 来结尾， 直接就把 es 写。
