初中英语变否定句的几个注意.doc

初中英语学习辅导：变否定句的几个注意一。将肯定句变为否定句时,一般情况下在句中助动词。系动词或情态动词后加not。但有时并非如此,而是要改变句中的某些词。现列举如下:(一)改变副词。例如:1.He is always late for school.He is never late for school. 2.The boy almost always goes to bed at 10 oclock.The boy hardly ever goes to bed at 10 oclock. 3.He is still a worker.He is no longer a worker.(二)改变连词。例如:Both Jim and Tom like reading.Neither Jim nor Tom likes reading.(三)改变不定代词。例如:All of the students are from the countryside.None of the students are from the countryside. (四)改变限定词。例如:1.He spent much time playing every day.He spent little time playing every day.2.Many people know the news.Few people know the news.二。肯定句变否定句时,既可以在句中助动词。系动词或情态动词后加not,也可以不加not,而只须改变句中的某些词。例如:1. He knows everything about your school.He doesnt know anything about your school.He knows nothing about your school. 2. I know both of them. I dont know either of them.I know neither of them. 3.Tom feels happy today.Tom doesnt feel happy today. Tom feels unhappy today. 4.The boy looks like his father. The boy doesnt look like his father. The boy looks unlike his father.三。变否定句时,某些形容词。不定代词。副词等也随之改变。例如:1. I can see some mountains far away. I cant see any mountains far away. 2.He has already had breakfast. He hasnt had breakfast yet. 3.We can swim, too.We cant swim, either. 4.Jim likes meat a little.Jim doesnt like meat at all.四。当主句谓语动词是think, suppose, believe, guess和imagine等时,后面的宾语从句要表示否定意义时,通常将not提到主句的位置上。例如:I think his proposal is valuable.I dont think his proposal is valuable. 注:not和代词all, each, everyone, everybody及副词both, quite, altogether, always等连用时表示部分否定。例如:1.Not all the students prefer maths.并非所有的学生都喜欢数学。