1、三年级英语下册上期中语法总结,外研版（三起）,a/an(一，一个，一只.)的用法,关于名词单复数形式,英语复数变化规则大约有九种，我们现阶段仅仅接触三种；,1.大部分情况，英语名词变复数形式只用在名词后面加S即可，比如： one appletwo apples one tigerfive tigers,2.以s、z、x、ch、sh结尾的词,在该词词尾es构成复数.比如： one bustwo buses one boxnine boxes,3.还有一种就是特定形式，比如one manthree men one womaneight women,1.大部分情况下，表示一个什么的时候只需要在名词前
2、面加a即可，比如：a tiger, a pear, a book, a desk, a basketball.,2.在遇到以元音发音开头的单词时，用an表示一个，比如：an apple, an orange, an elephant, an hour.,关于do, does与am,is,are,关于like（喜欢）这个词,like后面加动词的ing形式，大部分动词是直接加ing即可，但动词变成ing形式规则不尽相同，我们现阶段记忆住一下几个即可： readreading, rideriding, skipskipping, swimswimming watchwatching, playpla
3、ying, runrunning,do和does一般表示“做”，am,is,are一般表示为“是”；am比较好辨别用途，因为am与I连用；do和are一般与复数或第二人称（you）连用，does和is一般与单数或第三人称（他/她/它）连用，举例说明： I am on the phone. Do you like play football? Yes, I do/ No, I dont. Do Sam and Amy go to work today? Yes, They do./No, They dont. Does Sam go to work today? Yes, he does./No,he doesnt. Does she watch TV in the morning? Yes, she does. The monkey is short. / The two monkeys are short./He is short. You are short ./ Are you at home now?,
