Question

they can make cards，改为过去时态改为否定句一般疑问句改为肯定回答和否定回答？

Answer 1

1.一般过去时表示过去某个时间里发生的动作或状态，可以表示过去某段时间内习惯性、经常性的动作、行为。在英语语法中，“时“指动作发生的时间，”态“指动作的样子和状态。句式：主语+动词过去式+宾语+其它　
例句：
I had a word with Julia this morning.今天早晨，我跟朱莉娅说了几句话。
He smoked many cigarettes a day until he gave up. 他没有戒烟的那阵子，抽烟抽得可凶了。
2.根据上述公式，They can make cards.改成一般过去时的句子是They could make cards.
3.否定句是表示否定的句子。必须有否定词。英语中否定句通常借助否定词no,not，never，nothing，nobody，none，etc，半否定词hardly scarcely，few，little，etc．以及否定词缀构成。
一般说来，all/both/every-+ not =部分否定；none/neither/no-=完全否定；any/either/ any-+not =完全否定。
every-，指那些以 every 开头的复合词，如 - everybody，everything，everywhere，etc.
no-，指那些以 no 开头的复合词，如：nobody，nothing，nowhere，etc.
any-，指那些以 any 开头的复合词，如：anyone，anything，anywhere，anybody，etc.
例如：
All that glitters is not gold.
【译文】发光的东西除了金子，还有别的东西。
4.根据上述分类，建议将They can make cards.改写成三种否定句。
（1）They can never sing a song.全否定。
（2）They can not make cards.全否定。
（3）They can hardly make cards.半否定。
5.一般疑问句是疑问句的一种，一般只用yes或no来回答的句子。朗读时用升调，答语则用降调。英语中一般疑问句的结构是：be或情态动词或助动词 + 主语 + 其它部分。
一般疑问句及其回答的具体公式如下。
（1）Be动词疑问句公式。系动词+主语+表语+其他？eg.Are you a student？
回答公式。yes/no+主语+系动词的相应时态 eg.Yes，I am.No，I am not.(I'm not)
（2）助动词疑问句公式。助动词+主语+谓语+其他？eg.Do you like it？
回答公式。yes/no+主语+助动词的相应时态.eg Yes，I do.No，I do not.(I don't)
（3）情态动词疑问句公式。情态动词+主语+谓语+其他？eg.May I sit here？
回答公式。yes/no，主语+情态动词的相应时态.eg Yes，you may.No，you mustn't.
6.They can make cards.从其句子结构分析，有情态动词can，所以要适用公式（3）情态动词疑问句公式。情态动词+主语+谓语+其他？变成Can they make cards?肯定回答是Yes，they can.否定回答是No，they can't.

Answer 2

过去时态

They could make cards.
否定句：
They can't make cards.
They couldn't make cards.
一般疑问句：
Can they make cards?
Yes, they can.
No, they can't.
Could they make cards?
Yes, they could.
No, then couldn't.

Answer 3

they can make cards。改为过去式是they could make cards。改为否定句是they cannot make cards。改为一般疑问句是can t hey make cards 问号。肯定回答是yes。they can。否定回答是No,they cannot。

Answer 4

这句话中有情态动词can，后面接动词原型，所以变为过去时态是把can变为could，所以过去时态

They could make cards.

否定句：
They can't make cards.

They couldn't make cards.

一般疑问句：
Can they make cards?
Yes, they can.
No, they can't.

Could they make cards?

Yes, they could.

No, then couldn't.
希望对你有帮助。

Answer 5

过去时态：They could made cards.否定句：They can not make cards.一般疑问句：Can they make cards?肯定回答：yes,they can.否定回答：no,they can not.