Danny is worried about his Chinese为什么不是be+Ving吗 为什么这里用 worried worried是worry的过去式吗

Danny is worried about his Chinese为什么不是be+Ving吗 为什么这里用 worried worried是worry的过去式吗 This is Danny.Danny is my friend错在哪? Danny is tired----介词milk _____is Danny?He is OK. Danny's grades aren't very good .his class is having atest soon and he has written to three of his friends to ask for study advice.Here are their replies:　　From:Amy　　To:Danny　　Hi,Danny,you sound worried.Yes,I‘m going to study all weeken < > tail is hurt A,Danny's B,Danny danny Danny What is she worried about? This is Danny Deer翻译成汉语 Danny help let is 连词成句 Danny is thirsty.(改为一般疑问句） 英语翻译Danny is always _____ _____ someting. my name is Danny.改为一般疑问句 Danny is throwing the basketball __the net 改错：Danny and Janny is very slow. His name is Danny?改为一般疑问句 Danny is (担心的)about his Chinese