2020八年级上册英语unit1-3知识点及语法（人教版）
3. want to do sth.意思是“想要做某事”；
want sb. to do sth.意思是“想要某人做某事”。如：
do you want to go to the movies with me？你想和我一起去看电影吗？
the teacher doesn't want us to eat hamburgers.老师不想让我们吃汉堡包。
练习： his mother wants him ___ at home today.
a. stays b. stayed c. to stay d. staying
4. be good for...表示“对……有益（有好处）”。其反义为：be bad for...。后接名词、代词或动名词；be good at意为“擅长……”，后接名词、代词或ving形式。be good with意为“灵巧的；与……相处得好”；be good to意为“对……友好。
(1).(乌鲁木齐) 1 think drinking milk is good ____ our health.
a.for b. to c. with d. at
5. try to do sth.表示“ 尽力做某事 ” ，不包含是否成功的意思 / try doing sth. 表示“ （用某一办法）试着去做某事”。 如:you’d better try doing the experiment in another way. 你最好试试用另一种方法做这个试验。
练习： he must _____ his sister with her math.
a. try help b. trying to help c. trys to help d. try to help
6. help sb. (to) do sth.帮助某人做某事
.练习：eating fruit and vegetables can help you ______ more vitamins
a. got b. getting c. to get d. gets
7. be the same as 和…一样 / 反义词： be different from 和…不同
练习：1.life in the country is quite _______ that in the city.
a. the same b. different from c. full of d.the same as
2.is your pen _______ jim’s?
a.same as b.the same c.the same with d.the same as
8. kind of = a little / a kind of 意思是“一种”
练习：how many ______ medicine are used for the children of six years old?
a. kind of b. kinds of c. kind d. kinds
9. keep in good health = keep healthy = stay healthy =be healthy 保持健康
that sounds interesting. 这是“主语+系动词+表语”结构的简单句。sound（听起来），look（看起来），smell（闻起来），taste（尝起来），feel（觉得），seem（好象），grow（变得） , get（变得）等词在英语中可用作系动词，后跟形容词作表语。如： it tastes good. 这味道好。
the music sounds very sweet. 这音乐听起来很入耳。
练习：we should keep our classroom ______.
