以下是一些簡單的語法結構的英文短句子：
1. 主語 + 謂語動詞 + 其他成分：The cat is playing with a ball of yarn.
2. 疑問句：How tall is your sister?
3. 否定句：My dog doesn't like to swim in the rain.
4. 被動語態：The table was built by my father.
5. 複合句：I like to eat food that is fresh and tasty.
6. 並列句：I can sing and dance, but I can't swim.
請注意，這些句子都是簡單的語法結構，但語法規則可能會因不同的語言和語境而有所不同。如果您需要更詳細的信息，建議查閱相關的英語語法書籍或諮詢英語教師。