They could have made a difference with a little effort .的中文 意思?

They could have made a difference with a little effort .的中文 意思? They say that the footprints could have been made by...句中could可用may/might They say that the footprints could have been made by bears.句中的could可用may/might代替吗?如果有可能请详细解释could和may /might在 表示推测的用 Could they have forgotten their class. If pills could make you smarter ...正方观点 If scientists have made these amazing medicines ,why not have a try?They could help in different ways.Students could have better memories,stay energetic and learn more easily.They could get better grade They made such loud noise that it could __even in the street.A hear B be hearing C have heardD be heard though my mom could have made enough somehow 请求翻译 Some women ______ a good salary in a job instead of staying at home,but they decided not to workfor the sake of the family..A.must makeB.should have madeC.would makeD.could have made Some women___a good salary in a job instead of staying home,but they decided not to work for the sake of the family.A、must makeB、should have madeC、would makeD、could have made They have made much progress__(用）their hard work. What decision have they made?改被动语态 they have made an _______(协议) about the plan. what have they made great improvement____填什么? They should have made sure it got back to me. 5. They began to think about what use could be ___ such material. A. made up B. made from C. made of D. made intoplease explain 【高一英语选择】They began to think about what use could be ____ such materials.A made up B made fromC made of D made out 5.They began to think about what use could be ___ such material.A.made up B.made fromC.made of D.made into they have been tather timid in the changes they have made,求翻译 In fact,you did not know they could have been