三年级英语练习题姓名:_________ 班级:__________ 成绩：___________ 介词的用法： 1、in在……里面，季节，早、中、晚 in the lake在湖里 in spring 在春天 in the moring在早上 in the afternoon在下午 in the evening在晚上 2、on 用于星期前, 在……上面 on Sunday 在周日 on the desk在桌子上3、at（表示在小地方） 在…… at home在家 at school在学校4、 to 向 Happy birthday to you! 祝你生日快乐！5、for 给 Here is a present for you!这是给你的礼物6、under 在……下面 The cat is under the tree.猫在树下7、behind在……后面 The monkey is behind the door.猴子在门后一、选词填空on in under for to behind at1. She goes to school ____________Mondays.2. In summer, he swims ____________the lake.3. Happy birthday ____________ you!4. It’s warm____________ spring.5. The box is____________ the door.6. Amy is____________ home.7. The cat is____________ the tree.8. Here is a present____________ you!第三人称单数的用法第三人称：he他 she她 it它 your mother/father你的妈妈/爸爸单个人名(Daming,Amy)，动词要用第三人称单数形式。
动词的第三人称单数形式构成规则1. 一般情况下，大多数动词在词尾直接加“s”play—plays swim—swims walk—walks like—likes 2. 以“ x, ch, sh，o”结尾的，在词尾加“es”.box—boxes watch—watches wash—washes go—goes do—does 3. 以辅音字母加“y”结尾的，要先将“y”变为“i”，然后再加“es”fly--flies4. 特殊变化：have—has 一、 根据句意，从括号内选择正确的单词填空1.__________(Does/Do) she go to school on Saturdays?2.In the morning, he __________ (have/has) Chinese and English.3.Mum__________(goes/go) shopping on Sundays.4.Daming__________(fly/flies) a kite in the park.5.In summer, my brother__________(swims/swim) in the lake.6.The cat_________(like/likes) fish.7.He___________(plays/play) football in autumn.8. In winter, Amy_________(walk/walks) in the snow.9.Tom__________(doesn’t/don’t) go to school on Mondays.10.My sister ____________(hasn’/haven’t) got a bike.。