At the age of fifteen,he became a famous pianist里找出那个单词是主语,连

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At the age of fifteen,he became a famous pianist里找出那个单词是主语,连系动词,表语

主语是he
系动词是became
表语是a famous pianist
作为系动词,它本身有词义,但不能单独用作谓语,后边必须跟表语,构成系表结构说明主语的状况、性质、特征等情况.
表语是用来说明主语的身份、性质、品性、特征和状态的,表语常由名词、形容词、副词、介词短语、不定式、动词的-ing、从句来充当,它常位于系动词（be, become, appear, seem,look,sound,feel,get,smell等词）之后.
这个句子中,表示主语he的性质的就是a famous pianist（一个著名的钢琴家）.

At the age of fifteen,he became a famous pianist里找出那个单词是主语,连 he became famous at the age of 6 = At the age of twelve he became __________ in science. Grace ( ) of being a pianist when she was at the age of 6 at,became ,the ,he ,age,deaf ,of ,ten,at 连词成句 He became very i[ ] in music at the age of five she began a in badminton at the age of 6 and at last became The book （）（write） by a famous writer at the age of 20. 动词填空 After ten years of hard practice,he became a ____ pianist. At the age of 10,his parents sent him to a famous school这个句子 When the famous pianist was a child,he was accustomed ______ he at the age of 5和 he is at the age of