1. I never heard them speak English. I never heard him sing.
2. Have you heard me translate their coversation. Have you heard her leave the room? Have you heard us enter the room? Have you heard us answer the teachers questions? Have you heard them knock the door? Have you heard her play the piano?Have you heard them discuss this question?
3. We saw them help the old lady to get off the bus. We saw some young men jump the queue. Have you seen them laugh at something? Have you seen her sit in the reception room? Have you seen us play tennis? Have you seen him play volleyball? Have you seen our professor do the operation?
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