1、一般现在时主语单三人称时的动词变化
①在一般现在时中，当主语为第三人称单数时，动词要用“s”型
i）在动词尾直接加 s。如：
play—plays， want—wants， work—works， know—knows， help—helps，
ii）以字母s、x、ch、sh或o结尾的动词加-es；如：
guess—guesses， fix—fixes， teach—teaches， wash--washes， go—goes，do—does，watch—watches，catch—catches
iii）以辅音字母＋y结尾的动词，先变y为i，再加-es。如：
study—stu
2、dies，carry—carries，fly—flies，family—families, cry--cries
强调如何将主语是第三人称单数的肯定句变为否定和疑问句。
注：1、除三单外,其他人称的特殊疑问句：特殊疑问词加do来提问。如：What do you have? Where do they live? (除三单外其他人称包括I,we,you,they,my friends,his parents,Mike and Davis,my dogs...)
2、三单的特殊疑问句:特殊疑问词加does来提问。如：What does he\she\it\have? Where do
3、es your brother\ dog\ friend live?回答用He\ She\ It \My friend lives...这时候回答要用动词的S形式。
3、非三单的否定句，直接在动词前面加don’t.
三单的否定句在动词前面加doesn’t,后面要用动词原形。即“三单的疑问句和否定句中，有了does，后面要用动词的S形式。
4、非三单的一般疑问句用do放句首来引导，三单的一般疑问句用does放句来引导，后面用动词原形。一般疑问句就是以助动词（do，does）、Be动词（am，is，are）、情态动词（can,may, will,could,等）引导，用YES或NO来回答
4、
1）His mother works in a factory．
His mother doesn’t work in a factory．(否定句)
Does his mother work in a factory？（一般疑问句）
2）Mr Li teaches us English．
Mr Li doesn’t teach us English．（否定句）
Does Mr Li teach you English？（一般疑问句）
用下列词的适当形式填空
1.She____________(have) blue eyes.
2.We __________(go )
5、 to school every day
3.The boy ______________(like) blue.
4.We____________(have) two cats.
5.She____________(write) to her mother once a week.
6.She often_____________(watch)TV on Saturdays.
7. Peter and Mary often___________(play) badminton together.
8..My mother____________(have) many brothe
6、rs.
9..______(do)she _______(like) playing the violin? Yes,she_______(do).
10..She______(have)four brothers. She_________(like) them very much.
11.. He often ___________(have) dinner at home.
12.. We ____________(not watch) TV every day .
13..Sandy usually ___________(play) the piano on Sunday
7、s.
14..The cat_____________(not like) eating fish every much.
15.. Su Hai and Su Yang _________(have) eight lessons this term.
16.. She and I ____________(help) each other .
17.Li Lei often _______(help) me _________(study) English .
18.Could you please __________ (teach) me English ?
19.He __
8、read) English every day.
20.I can ____________(draw) many beautiful pictures.
．翻译下列句子
1.他每天说英语。____________________________
(改为否定句)________________________________
（一般疑问句）__________________________________________
3.他有一些书。_________________________(否定句)______________________
(一般疑问句)_____________________________________。
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