内容正文:
Unit 2 This is my sister.
第三课时 单元语法精讲与精练(Grammar Focus)
英语 七年级 上册•R
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二、单数句变复数句
单数句变复数句的特点总结如下:
1.主格人称代词要由单数形式变为复数形式。 即I—we;you—you;he/she/it—they。
2.am或is要变为are。
3.指示代词this变为these, that变为 those。
4.不定冠词a或an要去掉。
5.可数名词单数形式要变为复数形式。变化时要注意以下规则:
类别
构成方法
例词
一般情况
加-s
boy-boys
以 s、x、ch、sh
等结尾的词
加-es
box-boxes
watch-watches
以辅音字母加y结尾的词
变y为i,再加-es.
family-families
单元语法精练
Ⅰ.用括号内所给单词的适当形式填空。
1.Those (boy) are my new friends.
2.Mr.and Mrs.Zhang are her (parent).
3.Look,those are my (photo).
4.What (be) these in English?
5.That is his (aunts).
6. (it) are my computer games.
7.Those (not be) my notebooks.
8. (this) are my rulers.
9.The boy and the girl are my (cousin).
10.Her (brother) are teachers.
boys
parents
photos
are
aunt
They
aren’t
These
cousins
brothers
Ⅱ.单项选择。
( )11.Mom, my friends,Sam and John.
A.this is
B.they are
C.he and she
D.these are
( )12.—Are your fri