请分析这个英文句子,有关于语法和句子结构及单词的用法（急需）

请分析这个英文句子,有关于语法和句子结构及单词的用法（急需）
Stray birds of summer come to my window to sing and fly away.
And yellow leaves of autumn, which have no songs, flutter and fall
there with a sign.