1. The teacher said to Nam, “ Do you understand this lesson ?” The teacher asked Nam If he understood that lesson. The teacher asked Nam If I understood that lesson. The teacher asked Nam that he understood that lesson. The teacher asked Nam if he understood this lesson. 2. They will grow a lot of trees in the school garden. A lot of trees will grown in the school garden. A lot of trees will be grown in the school garden. A lot of tress will be grew in the school garden. A lot of trees will be grow in the school garden. 3. Mary keeps forgetting her time to class. Mary is forgetting her time to class. Mary is always forgetting her time to class. Mary is always keeping her time to class Mary is always keeping forgetting her time to class. 4."We are decorating our Christmas tree,” Hoa said. Hoa said that they was decorating their Christmas tree. Hoa said that they were decorating their Christmas tree. Hoa said that he was decorating his Christmas tree. Hoa said that they decorating our Christmas tree. 5. Clement Clark Moore wrote the poem in 1823 The poem was written by Clement Clark Moore in 1823. The poem is written by Clement Clark Moore in 1823. The poem were written by Clement Clark Moore in 1823. The poem was written by Clement Clark Moore in 1923. 6. The taxi broken down. The taxi was taking us to the airport. The taxi taking us to the airport broken down. The taxi was taking us to the airport broken down. The taxi takes us to the airport broken down. The taxi took us to the airport boken down. 7. There's a party at Mary's house next week. Next week, Mary was having a party at her house. Next week, Mary is having a party at her house. Next week, Mary having a party at her house. Next week, Mary are having a party at her house. 8. Our meeting is tomorrow. We are having a meeting tomorrow. We is having a meeting tomorrow. We were having a meeting tomorrow. Our were having a meeting tomorrow 9. He continues to forget his homework. He is always forgeting his homework. He is always forgetting his homework. He is forgetting his homework. He was always forgetting his homework. 10. Shall I carry this suitcase for you ? Would you carry this suitcase for you ? Would you like to carry this suitcase for you ? Would you like me to carry this suitcase for you ? Would you like carrying this suitcase for you ?