Question

句型轉換（共10個空，每空0.5分，滿分5分）
小題1: Going to sleep early is important for the teenagers.
__________  _________  _________  for the teenagers to go to sleep early.
小題2: You should read more English books.
You  ________  _________ read more English books.
小題3:He had to stay up late last night because he hadn’t recited NCE.(改為否定句)
He ________  _________  _________ stay up late last night because he had recited NCE.
小題4: If it doesn’t rain tomorrow, we will climb Baiyun Hills.
We will climb Baiyun Hills _________ it _________ tomorrow.

Answer 1

小題1:It is important 
小題2:ought to
小題3:didn’t have to
小題4:unless… rains

試題分析：
小題1:句意：早睡是對年輕人很重要的。這里是it is+形容詞+for sb to do ，it是形式主語，真正的主語是to go to sleep early ，故用It is important。 
小題2:句意：你應該多讀英語書。這里should=" ought" to “應該”，故用ought to。
小題3:句意：他不得不熬夜因為他沒有背下來新概念英語。因為謂語動詞是had to，變否定句的時候應該用助動詞didn’t 來幫助構成，故用didn’t have to。
小題4:句意：如果明天不下雨，我們將去登云臺山。這里if …not =" unless" ；unless引導的是條件從句不能用將來時而用一般現(xiàn)在時，故用unless… rains。