初一英语语法知识点
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初一英语语法知识点(一)
助动词(do, does)的用法只有实意动词作谓语时才涉及使用助动词。以like为例:
(1)当句子为肯定句时不涉及使用助动词,只涉及"主谓一致"原则。
eg : I like English a lot.
Michael likes Chinese food very much.
(2)当句子为否定句时,要根据主语的人称来决定使用相应的助动词:当主语为"三单"时,要使用does;当主语为"非三单"时,用助动词原形do。例如把下列句子变否定句:
Kangkang likes math.----Kangkang doesn't like math.
They like sports.------They don't like sports.
(3)当句子变疑问句时,同样要根据句子的主语来决定在句首使用Do或Does.例如下列句子变问句:
Michael likes Chinese Food.----Does Michael like Chinese food? Yes, he does./ No, he doesn't.
Jane and Helen like music.----Do Jand and Helen like music? Yes, they do./ No, they don't.
初一英语语法知识点(二)
可数名词变复数时,有规则变化和不规则变化两种。
1、规则变化:
(1)一般情况直接在词尾加"-s ",如:cake-cakes, bag-bags, day-days, face-faces, orange-oranges等;
(2)以s, x, sh, ch结尾的词,要在词尾加"-es ",如:bus-buses, watch-watches, box-boxes等;
(3)以辅音字母加y结尾的词,变y为i再加"-es ",如:baby-babies, country-countries, family-families等;
(4)部分以f (e)结尾的词,变f (e)为"ves ",如:knife-knives, half-halves等;
(5)以o结尾的词,加"-s "或"-es ",如:zoo-zoos, photo-photos, tomato-tomatoes, potato-potatoes等。记忆口诀:除了"英雄"hero外,凡是能吃的,加"-es ",不能吃的加"-s "。
2、不规则变化:
(1)改变单数名词中的元音字母:man-men, woman-women, foot-feet, tooth-teeth等;
(2)单、复同形:sheep-sheep, Chinese-Chinese, Japanese-Japanese等;
(3)其他形式:mouse-mice, child-children等。
初一英语语法知识点(三)
1. 名词变复数规则
(1)规则变化
1)一般在名词词尾加--s,如:car----cars; photo---photos; toy---toys; boy---boys
2)以s, x, ch, sh结尾的词,在词尾加---es,如:box---boxes; bus---buses
3)以辅音字母+y结尾,变y为i再加es,如:baby---babies; family---families
4)以fe结尾,变fe为v再加es,如:knife--- knives
(2)不规则变化:
如:foot---feet; man---men; woman---women; snowman---snowmen;
2. 集体名词:people, clothes, police, family
3. 成双出现的名词:shoes, pants(trousers), gloves, eyes, ears
一词多义:An orange is orange.