肯定句变否定句解题

把肯定句转换成否定句是句型转换中的一个重要部分。主要形式有以下几种。

  1. 若句子的谓语动词为 to be,to have,表示“具有”或“占有”, 可在它们后面直接加 not 变成否定形式,谓语部分有助动词或情态动词,也是在它们后面加 not 变成否定形式。至于 do not,就应按相对行为动词处理。如:

My mother is a teacher.

否定:My mother isn't a teacher.

  1. 不定代词 some,something,someone,somebody 换成对应的 any, anything,anyone,anybody,也可表示一个句子的否定。如:

I saw someone in the corner.

否定:I didn't see anyone in the corner.

  1. no,nothing,nobody,no one 也可构成否定式。如:I sawnobody in house。

但是,我们应注意,当不定代词作主语时,不能把不定代词变为它的否定形式,而应把谓语动词变否定形式。如:

Something happened that day.

否定:Something didn't happened that day.

  1. 由不定代词 all,both 或由 so 引导的倒装句,变否定句就是把它们分别改为 none,neither,nor 或 neither,而 both⋯and 连接的句子变否定句时,除把 both⋯and 改为 neither⋯nor 外,谓语动词及其他词也要作相应的变化。如:

Both you and I are women.

否定:Neither you nor I am a woman.

  1. 当 think,believe,feel,suppose,imagine 等作为主句中的谓语动词,后跟宾语从句变成否定句时,否定词 not 大多前移至主句部分。

  2. 其它,如副词 too 应变为 either,already 改为 yet,有时更换动词或借用否定前缀也能表达否定的意思。如:

He agrees with me about this.

否定:He disagrees with me about this. I failed in the final exam.

否定:I succeeded in the final exam.

  1. 下面的例子可说明祈使句和疑问句的否定转换形式: Put it up on the

    wall.

否定:Don't put it up on the wall.

Do you have any oranges?

否定:Don't you have any oranges? Why will you keep your promise?

否定:Why won't you keep your promise?