v-ing表示主动，进行，在句中可表示主动，进行，在句中可作作主语，宾语，宾补，表语，定语，状语主语，宾语，宾补，表语，定语，状语Analyze ving form in each sentence:1.Finding ways to grow more rice has been his life goal.2.His performance is disappointing.3.He tries cutting and chewing the bottom of the shoe.4.They did everything they could to prevent the river from being polluted.5.There is a swimming pool in our school.6.I heard someone playing the piano in the next room.7.They went out of the classroom,talking and laughing.主语主语表语表语动宾动宾介宾介宾定语定语宾补宾补伴随状语伴随状语?
