四年级上知识点总结.doc

四年级上知识点总结am第一人称“I”使用；1.be动词is除第一人称之外的单数和不可数名词；are复数形式使用；3.可数名词复数变化规则；一般情况直接加-s，以e结尾的只加-s；cowcowslionlionshors；以s、x、sh、ch、z结尾的加es；watchwatchesboxboxes；以辅音字母加y结尾的变y为i再加es；以元音；stram 第一人称 “I”使用1.be 动词 is 除第一人称之外的单数和不可数名词使用are 复数形式使用3.可数名词复数变化规则 一般情况直接加 - s ，以e 结尾的只加 -scowcows lionlions horsehorses 以s、x、sh、ch、z结尾的加 eswatchwatches boxboxes busbuses以辅音字母加y 结尾的变y为i再加 es； 以元音字母加y结尾的加-sstrawberrystrawberries boyboys 以o结尾的，有生命加-es 无生命加-stomatotomatoes photo(照片)photos 不规则变化：footfeet（脚） sheepsheep（绵羊） fishfish（鱼）manmen （男人） womanwomen（女人） childchildren（孩子们） policemanpolicemen（男警察） policewomanpolicewomen（女警察）4.常见缩写（完整）形式I am = Im is not = isnt are not = arent do not = dont does not = doesnt what is = whats who is = whos they are = theyrewe are = were you are = youre it is = its he is = hes she is = shes 5.特殊疑问句 A.询问职业1) What is +单数（he/she/your mother/father/grandpa/his sister/her aunt?）？ He/She is a ?(职业)例句：What is your uncle ? He is a policeman. 2）What are +复数(they/your grandpa and grandma?) ?They are ?（职业复数）例句：What are your father and mother ? They are workers.3） What are you ? 你是做什么的？ I am a student. 我是一名学生。 B.询问别人拥有什么What do you have ? 你（们）有什么？ What do they have ? 他们有什么？ I/We have ? They have ?What does he have ? 他有什么？ What does she have ? 她有什么？ He has ? She has ? What does Colin(单数人名) have? 科林有什么？ Colin/He has ?注：句子后也可加地点 如： on the farm (在农场) in the box （在盒子里）例句：What does Susan have in her box ?C.询问吃什么1）Whats for breakfast/lunch/dinner ? What do you(we) have for ? ? We have ?(食物) /I have ? We/I have ? 2）What does he/she have for breakfast/lunch/dinner ? He/She has ?例句：What does Lucy have for lunch ? She has rice, chicken and vegetables .D.询问什么时候做什么1）When do you +动词短语 ？ 例句： When do you get up ? I/We +动词短语+时间 I get up at six in the morning. 2) When does he/she +动词短语 ？ 例句： When does she have classes ?He/She+动词单三形式+其他+时间 She has classes at eight in the morning. 在几点用at加数字表示，如：at six 在六点 at twelve 在十二点表示时间的短语： in the morning在早上 in the afternoon 在下午in the evening在晚上（指天刚黑