do的完成时态是什么意思中文
do表示这个句为过去式吗？
do表示这个句为过去式吗？
过去式： did 过去分词： done；
do
v.做，干，办(某事);(以某种方式)做;行动;表现;(问询或谈论时用)进展，进行
aux.用于实义动词前构成否定句和疑问句;构成附加疑问句;代替实义动词以避免重复
n.社交聚会;社交活动
n.宴会;（口语）必须做到的事情 扩展资料
What in the world did they think they were doing
他们到底认为自己在做什么？
He would do well to concentrate more on his work.
他最好还是更加集中精力在工作上。
One major problem did present itself, though.
不过，确实出现了一个重大问题。
do not有过去完成时吗？
did not 是 do not 的过去式,可以缩写为 didnt ,常用作一般过去时态的句子中,“帮助”实义动词完成疑问句或否定句。
例句：
He did not have breakfast this morning.他今天早晨没吃早餐。
Didnt you watch TV last night？
你昨天晚上没有看电视吗？
完成的和过去分词什么区别？
动词的过去式都是用在一般过去时态里面，而动词的过去分词是用在过去完成时和现在完成时里面。动词的过去分词还用在被动时态里面。
be 动词 过去分词：被动语态
The trees were planted on the hill . （ were planted ）
have /has 过去分词：现在完成时
Have you finished your homework？（have finished ）
had 过去分词：过去完成时
He said that he had been there twice. (had been )
名词 过去分词：过去分词做后置定语
The girl named Mary is my classmate. ( The girl named )
过去式是过去的时态，过去分词是表示被动 ，也可表示完成时，
例如do-did-done
I did the job。过去时；
I have done the job，完成时：
the job is done，被动