Yet在肯定句中很少使用，但当它被使用时，它意味着否定。

Yet is very rarely used in affirmative sentences, but when it is used, it implies a negative.

我能打篮球。（肯定句）

I can play basketball.

（肯定句）他上周打网球了。

He played tennis last week.

肯定句）（他待人没有礼貌。

He is impolite to people.

某人，有人，常用于肯定句中。

There is somebody waiting for you.

英语中WH移位对肯定句变疑问句是属于强制性的。

WH-movement is obligatory in English. It changes a sentence from affirmative to interrogative.

英语中WH移位对肯定句变疑问句是属于强制性的.

WH - movement is obligatory in English. It changes sentence from affirmative to interrogative.

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.

句子有三种形式:肯定句 、 否定句和疑问句.

There are three forms of the sentences affirmative, interrogative, and negative.

陈述句陈述事实、安排或观点的陈述句。陈述句可以是肯定句，也可以是否定句。陈述句以句号（.）结尾。

A declarative sentence declares or states a fact, arrangement or opinion. Declarative sentences can be either positive or negative. A declarative sentence ends with a period (.).