以定语从句这一项为例。把"I read a novel yesterday.和"It was extremely Interesting."这两个单句改为"The novel I read yesterday was extremely interesting."这就是定语从句的单项练习。首先要反复进行替换练习。如把"I saw a man this morning."和"The man is my teacher."改为"The man I saw this morning is my teacher."把"I saw a film last night."和"The film was very amusing."改为"The film I saw last night was very amusing."这种练习虽然是枯燥的,却是重要的基本功,务求把定语从句练到脱口而出的地步。这是第一步。