I went to school when i was seven years old,同义句

I went to school when i was seven years old,同义句 When I was seven years old 同义句 I began to study English when I was seven years old.同义句 同义句转换.1 When he was seven years old,he began to go to school 8A unit4II.同义句转换1.He went to school when he was seven years I started playing tennis when i was seven years old.同义句 I learneded piano when I was seven years old同义句 The boy went to school when he was five years old.（改为同义句） When I was seven years old 5道同义句转换：1.He went to Know York when he was seven years old When I was 7 years old ,I started school.(改为同义句) I often went to school by bus alone when I was young改为同义句 I