英語中的陳述句變特殊疑問句的規律是什麼

題目：

英語中的陳述句變特殊疑問句的規律是什麼

解答：

陳述句先變成一般疑問句,也就是先把助動詞提前,沒有助動詞的在句子前加上助動詞,最後在前面加上疑問詞就行了,如：I am reading a book.------Are you reading a book ----What are you doing?(有助動詞) He did his homework yesterday.----Did he do his homework?----what did he do yesterday?