小学英语语法二十(did的用法)
愁眉不展的 did
Hi!Dear friends! 大家都认识我吧,我是助动词did,我的最大特点就是善解人意、助人为乐嘛!可是呀,有时我的心情会很糟糕!这是因为一些粗心的朋友不理解我。现在我想把我的烦恼说出来,希望大家能够关心我,别再令我烦恼了,OK?
1. 到底何时使用我?
我和其它助动词一样,本身无意义,自己不能独立作谓语,只能和其它主要动词一起构成谓语,用于构成一般过去时的否定句和疑问句,当然也常常用于代替上文中的行为动词的过去式。如:
I didn't go to school last Sunday. 上周日我没上学。
Did you buy a new pen yesterday? 昨天你买了枝新钢笔吗?
2.我身后的动词到底用什么形式?
有的小朋友总不注意我身后的动词用什么形式,你说我多么烦恼呀!其实,在否定句和疑问句中,我身后的动词必须用原形。不信你来瞧:
他昨天没有在家吃午饭。
[误] He didn't had lunch at home yesterday.
[正] He didn't have lunch at home yesterday.
3. 我能用be动词代替吗?
不管怎么说,含有行为(实义)动词的一般过去时的肯定句变成否定句或疑问句时,不能用be动词,必须用到我!含be动词的句子构成否定句或疑问句都绝不会让我露面!有的小朋友总是让我委屈、让我烦,还是看看例句吧:
They went to the park last week. (改为否定句)
[误] They weren't go to the park last week.
[正] They didn't go to the park last week.
小朋友们这次了解我了吧,今后可别再出错啦,否则我一定会更加愁眉不展的!OK, see you next time!