M4U3

M4U2 Review

chicks pigs hens ducks cats dogs

1.不可数n:前不加a/an

2.可数n:

①单数前加a/an

②复数后加s/es

• +s

• 以s,x,ch,sh结尾 +es

• 辅音(除a,e,i,o,u以外) +y结尾,去y加ies

• f或fe结尾,去f或fe加ves

• 以o结尾

  1.无生命:+s

  2.有生命:+es [heroes potatoes tomatoes]

3.a/an the:

the 特指,确实,前面有出现

a/an 一个,不确定

ana e i o u开头

Unit 3 Plants

Grammar

1.have,has用法 "拥有" 主语 + have /has

口诀:

你(you)有我(I)有大家有(复数),用have
他(he)有她(she)有它有(it)个人有(单数),用has

2.there be句型 "某地有某物"

①There are twelve students in the classroom.

②There is a book on the table.

就近原则

There is a flower and two seeds.
There are two seeds and a flower.