改为同义句My hobby is collecting old coins

改为同义句My hobby is collecting old coins my hobby is to collect coins.my hobby is collecting coins 我见 My hobby is collecting old coins.中间用不定式可以吗,分词在这做什么成分呢? Both Lily and Lucy like collecting coins.(改为同义句) 小学英语阅读everyone has his hobby.my hobby is collecting coins. i My hobby is s____ old coins.怎么填? My hobby is collecting old coin.和My hobby is to collect old My hobby is __________ all kinds of coins.A collecting B to My hobby is growing flowers改为同义句 My hobby is playing the piano.改为同义句 My hobby is collecting stamps. Collecting stamps is my hobby.