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.
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.
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