肯定句变否定句练习题1.I am a student.2.He is here.3.They are going to go fishing this week.4.They are working hard.5.She was a teacher.6.They were very happy.7.We can dance very well.8.He will come to see you at the school gate.9.They will clean the classroom tomorrow.10.They do sports every day.11.I often have breakfast at 7 a.m.12.We do morning exercises on the playground.13.He gets up at six.14.Tom has something to tell his teacher.15.My mother does some washing every morning.16.Alice likes singing and dancing.17.We visited the old man yesterday. / 18.They had a good time yesterday morning.19.Jack did his best to finish his work.20.He read ten books last night.21.She put his watch on the desk.22.He has finished his homework.23.I have learned English for ten years.24.Mary has been in Beijing since 2000.25.He has already finished his high school.26.Youd better get up early.27.You had better give up smoking.28.There are some apples on the tree.29.Mary had finished her homework yesterday.30.Open the window. 温馨提示：最好仔细阅读后才下载使用，万分感谢！