如果句子是以肯定句开始的，那附加疑问通常使用否定句。
If the first part of the sentence is affirmative, the tag question is usually negative.
句子有三种基本形式：肯定句、疑问句和否定句。
There are three forms of the sentence:affirmative, interrogative and negative.
句子有三种形式：肯定句%、否定句和疑问句。
There are three forms of the sentences affirmative, interrogative, and negative.
句子有三种形式：肯定句、否定句和疑问句。
There are three forms of the sentences affirmative, interrogative, and negative.
仿照例句将下列句子改为否定句，再用缩写形式重写一遍。
II Change the sentences into negative forms, and then rewrite them in short forms according to the example.
把这些句子变为否定句。
在unless之后不能接否定句，因为这就造成了双重否定，句子没有意义。
You cannot have a negative sentence after unless because that would make the sentence a double negative and senseless.
把以下句子变成否定句。
把下列句子改成否定句和疑问句。
把下列句子改成否定句和疑问句。
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