五年级三单练习

一般现在时主语单三人称时的动词变化在一般现在时中，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：playplays， wantwants， workworks， knowknows， helphelps，ii）以字母s、x、ch、sh或o结尾的动词加-es；如：guessguesses， fixfixes， teachteaches， wash-washes， gogoes，dodoes，watchwatches，catchcatchesiii）以辅音字母y结尾的动词，先变y为i，再加-es。如：studystudies，carrycarries，flyflies，familyfamilies, 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 hesheithave? Where does 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dont.三单的否定句在动词前面加doesnt,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。1）His mother works in a factoryHis mother doesnt work in a factory(否定句)Does his mother work in a factory？（一般疑问句）2）Mr Li teaches us EnglishMr Li doesnt 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 ) to school every day3.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 brothers.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 Sundays.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 _(read) English every day.20.