肯定句变否定句20个例子英语：
1、肯定句：She is going to China next month.
否定句：She isn't going to China next month.
2、肯定句：There were some ducks and chickens on the farm too.
否定句：There weren't any ducks or chickens on the farm either.
3、肯定句：I am a teacher.
否定句：I am not a teacher.
4、肯定句：I can play the pianno well.
否定句：I cannot play the pianno well.
5、肯定句：His family will fly to Beijing.
否定句：His family won't fly to Beijing.
6、肯定句：The little boy should go to bed early.
否定句：The little boy shouldn't go to bed early.
7、肯定句：The students often sing songs after school.
否定句：The students don't often sing songs after school.
8、肯定句：The boys runs fast.
否定句：The boys doesn't run fast.
9、肯定句：The king showed his new clothes to us.
否定句：The king didn't show his new clothes to us.
10、肯定句：l am a student.
否定句：l am not a student.
11、肯定句：He is here.
否定句：He isn't here.
12、肯定句：They are going to go fishing this week.
否定句：They are not going to go fishing this week.
13、肯定句：They are working hard.
否定句：They are not working hard.
14、肯定句：She was a teacher.
否定句：She wasn't a teacher.
15、肯定句：They were very happy.
否定句：They weren't very happy.
16、肯定句：We can dance very well.
否定句：We can not dance very well.
17、肯定句：Tom has something to tell his teacher.
否定句：Tom doesn't have something to tell his teacher.
18、肯定句：My mother does some washing every morning.
否定句：My mother doesn't do some washing every morning.
19、肯定句：Alice likes singing and dancing.
否定句：Alice doesn't like singing and dancing.
20、肯定句：We visited the old man yesterday.
否定句：We didn't visite the old man yesterday.