Mr. Ant, the weather is really good today! Why are you working so hard?

Mr. Ant, what a nice day! Why do you work so hard?

Punctuation marks are written symbols used to express sentence reading and mood.

Punctuation marks are auxiliary symbols and part of written language, which are used to express pause, mood and the nature and function of words.

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1, period (. )

A point at the end of a sentence, which mainly indicates the declarative mood of the sentence.

2. Question mark (? )

A point at the end of a sentence, which mainly indicates the interrogative mood of the sentence.

3, exclamation point (! )

A point at the end of a sentence, which mainly indicates the exclamatory mood of the sentence.

4. Comma (,)

A point in a sentence that indicates a general pause in a sentence or paragraph.