初二英语下册知识点,菁选3篇
初二英语下册知识点1 1.Howoftendoyouexercise?你(你们)多久锻炼一次身体? Howoften+助动词do(does或did)+主语+dosth.?疑问词howoften是下面是小编为大家整理的初二英语下册知识点,菁选3篇,供大家参考。
初二英语下册知识点1
1.How often do you exercise?你(你们)多久锻炼一次身体?
How often +助动词do(does或did) +主语+ do sth.?疑问词how often是问频率(多久一次),(在这里助动词do(does或did)是起帮助构成疑问的作用)与一般现在时或一般过去时连用，回答一般是用表示频率的副词，如：once, twice, three times…, sometimes, often, quite, often, never, every day, once a week , twice a month , three times a month , three or four times a month等。
2“What do you usually do on weekends?” “ I usually play soccer.”
“周末你通常做什么?”“我通常踢足球。”
第一个do为助动词,在这起帮助构成疑问的作用;而第二个do则是实义动词。
3. “What’s your favorite program?” “It’s Animal World.”
“你最喜欢什么节目?”“动物世界。”
4. As for homework , most students do homework every day .
as for...意思是“至于;关于”，常用于句首作状语，其后跟名词、代词或动词的-ing形式(即动名词)。如：
5. Mom wants me to get up at 6:00 and play ping-pong with her .
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：
有很多动词后面用这种结构做动词的复合宾语
ask sb. to do sth.叫某人做某事
tell sb. to do sth.告诉某人去做某事
help sb. (to) do sth.帮助某人做某事
6. She says it’s good for my health.
be good for...表示“对……有益(有好处)”;其反义为：be bad for...(这里for是介词，后跟名词、代词或动名词)
7. How many hours do you sleep every night?
8. I exercise every day , usually when I come home from school .
9. My eating habits are pretty good .这里pretty相当于very 。
10.I try to eat a lot of vegetables , usually ten to eleven times a week .
try to do sth.表示“尽力做某事”，不包含是否成功的"意思
11. My healthy lifestyle helps me get good grades.
help sb.(to) do sth.帮助某人做某事
12. Good food and exercise help me to study better.
这里better是well的比较级，而不是good的比较级
13.Is her lifestyle the same as yours or different?=Is her lifestyle the same as your lifestyle or is her lifestyle different from yours?
be the same as … / be different from …
14. What sports do you play ?
15. A lot of vegetables help you to keep in good health .
keep in good health = keep healthy = stay healthy
17. 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。
初二英语下册知识点2
1.How often do you exercise?你(你们)多久锻炼一次身体?
How often +助动词do(does或did) +主语+ do sth.?疑问词how often是问频率(多久一次),(在这里助动词do(does或did)是起帮助构成疑问的作用)与一般现在时或一般过去时连用，回答一般是用表示频率的副词，如：once, twice, three times…, sometimes, often, quite, often, never, every day, once a week , twice a month , three times a month , three or four times a month等。
2“What do you usually do on weekends?” “ I usually play soccer.”
“周末你通常做什么?”“我通常踢足球。”
第一个do为助动词,在这起帮助构成疑问的作用;而第二个do则是实义动词。
3. “What’s your favorite program?” “It’s Animal World.”
“你最喜欢什么节目?”“动物世界。”
4. As for homework , most students do homework every day .
as for...意思是“至于;关于”，常用于句首作状语，其后跟名词、代词或动词的-ing形式(即动名词)。如：
5. Mom wants me to get up at 6:00 and play ping-pong with her .
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：
有很多动词后面用这种结构做动词的复合宾语
ask sb. to do sth.叫某人做某事
tell sb. to do sth.告诉某人去做某事
help sb. (to) do sth.帮助某人做某事
6. She says it’s good for my health.
be good for...表示“对……有益(有好处)”;其反义为：be bad for...(这里for是介词，后跟名词、代词或动名词)
7. How many hours do you sleep every night?
8. I exercise every day , usually when I come home from school .
9. My eating habits are pretty good .这里pretty相当于very 。
10.I try to eat a lot of vegetables , usually ten to eleven times a week .
try to do sth.表示“尽力做某事”，不包含是否成功的意思
11. My healthy lifestyle helps me get good grades.
help sb.(to) do sth.帮助某人做某事
12. Good food and exercise help me to study better.
这里better是well的比较级，而不是good的比较级
13.Is her lifestyle the same as yours or different?=Is her lifestyle the same as your lifestyle or is her lifestyle different from yours?
be the same as … / be different from …
14. What sports do you play ?
15. A lot of vegetables help you to keep in good health .
keep in good health = keep healthy = stay healthy
17. 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。
初二英语下册知识点3
使用Can you …?句型发出邀请并能正确回答。
1. I have to help my parents .我不得不帮助我的父母。
I’m sorry. I have to study for a math test.对不起，我得为数学考试而学习。
(1)have to表示“不得不”的意思,“形势逼迫”的意味;help的用法：help sb with sth .或help sb (to) do sth .
而must则着重说明主观看法,表示个人的意志,
eg.
I must go there to help the poor.
我必须去帮助那些穷人们。(表示说话人自己的看法。)
同时,在某些不需要强调这两种差别的"场合,两者可以互相换用。eg. I am afraid we have to / must leave now.我恐怕得走了。
2. study for…表示“为……而学”的意思,for的后面接study的目的,eg.
We study hard for the people.我们为人们而努力学习。
3. Thanks for asking .谢谢你的邀请。
for是个介词不能直接跟动词“ask”，所以动词变为动名词的形式“asking”起到名词作用。
Thanks for your photos . (photos为名词)
Thanks for helping me . (helping为动名词)
Thank you for your invitation to visit next week .谢谢你邀请我下周去做客。
4. I have a really busy week .我有个实在忙碌的一周。
5. I’m playing tennis with the school team .我将同校队打网球。
6. finish the geography project in the evening.在晚上完成地理作业。
7. come over to my house到我家来
come over to表示从一个地方来到另一个地方。
come over还有“过来”“顺便来访”的意思
8. Please keep quiet! I’m trying to study.
keep quiet动词keep的用法很多,但主要意思基本不变,主要是“保存、保持”,表示持有的意思,具体用法有名词我们在家养了一条狗。
(1)keep+反身代词,eg.
I kept myself warm by walking up and down.我踱来踱去以暖和身子。
(2)keep+sb/sth+形容词,eg.
The kettle is used for keeping water warm.热水瓶是用来保持水温的。
(3)keep+动词-ing形式,eg.
They kept working for another half an hour.他们又继续工作了半个小时。
(4)keep+sb/sth+动词-ing形式,eg.
She kept us waiting for quite some time.她让我们等了好一会儿。