does的用法
How high does the rock go?
这里的意思是 石头能走多高，这里的does是什么用法？
运气助词，不这么简单吧？
看了楼下的2位解释，还是不明白，does的用法
1、作实义动词，也叫形为动词。和普通的动词一样，有自己的实际意思，表示“做”。
例如：do 、homework, do exercises等。
当主语是I/We/You/They或者复数名词时，动词用do。
例如：I often do my homework in the evening .
当主语是He/She/It或者其他单数名词时，动词用does。
例如：
She often does homework in the evening .
2.作助动词，无实际意思。通常用于疑问句和否定句。
(1)用于一般疑问句。直接在句首加上do/does，注意大小写和部分人称及动词的变化。
例如：
I like apples.
Do you like apples?
Yes, I do. /No, I don't.
当主语是三人称单数时，用does.
例如：She likes apples.
Does she like apples?
Yes, she does. /No, she doesn't.
(2)用于否定句时，在句子中加上don't或者doesn't.
例如：I don't like apples.
She doesn't like apples.
扩展资料
do在句子中：
1、 构成一般疑问句
Do you want to pass the CET? 你想通过大学英语测试吗?
Did you study German? 你们学过德语吗?
2、 do + not 构成否定句
I do not want to be criticized. 我不想挨批评。
He doesn't like to study. 他不想学习。
In the past, many students did not know the importance of English. 过去，好多学生不知道英语的重要性。
3、构成否定祈使句
Don't go there. 不要去那里。
Don't be so absent-minded. 不要这么心不在焉。
说明： 构成否定祈使句只用do，不用did和does。
4、放在动词原形前
Do come to my birthday party. 一定来参加我的生日宴会。
I did go there. 我确实去那儿了。
I do miss you. 我确实想你。
He likes music.
He doesn't like music. 否定
Does he like music? 疑问
What music does he like? 疑问
Did he go to the park yesterday? 疑问，过去式
He will go to the park. (will 是助动词）
但是 He is tall.
He isn't tall.
Is he tall?本回答被网友采纳
含有实义动词的句子，有两种
1、主语+动词原形+其它
2、主语+动词第三人称单数+其它（主语是第三人称单数的情况下用）
变为疑问句要借助于助动词do 或 does 提问
这句话的主语是the rock，是第三人称单数，所以助动词要选用does
does出现，谓语动词要恢复原形。
一般do的用有3种
第一种: 用来改成疑问句的.
1. This is a book. (句子中没有动词)
2. he plays games. (有动词)
如果你想把他们变成疑问句的话. 第一句句子你可以把is放到句子前面而变成疑问句, 也就是 Is this a book.
可是第二句,不同于第一句句子,因为第二句有动词, 那你就需要"does" 来帮助. 也就是, Does he play games?
如果把它改成特殊疑问句的话,那就是. how often does he play games?
"does"这个单词在这句子种是没有意思的.
第二种: 在句子中做为动词:
he does his homework. "does"在这里就是做的意思.是一种动作
第三种: 就是用来强调语气的: 一般用于回答别人的问题.
A: Did you finish your homework?
B: yes, i did finish my homework. "did" 这里是强调和肯定他已经完成了作业.
Good Luck with your english.