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reason—reasonable 7．名词后＋y变为形容词 rain—rainy cloud—cloudy sun—sunny wind—windy
8．名词后＋ous变为形容词 danger—dangerous adventure—adventurous poison—poisonous 9．名词后＋ly变为形容词 friend—friendly week—weekly month—monthly year—yearly
过关演练
用括号内单词的正确形式填空
1．[2015·四川高考]Brian is gifted in writing music; he is very ________(like) to be a Beethoven.
答案：likely
2．[2015·福建高考]Human life is regarded as part of nature and, as such, the only way for us to survive is to live in________ (harmonious) with nature.
答案：harmony
3．[2015·陕西高考]Ellen is a ________(fantasy) dancer. I wish I danced as well as her. 答案：fantastic
4．[2015·湖北高考]If she had been aware that the mushrooms were ________(poison), she wouldn't have picked them for dinner.
答案：poisonous