急 Have you ever helped disabled children?把have换成did有影响吗?

急 Have you ever helped disabled children?把have换成did有影响吗? ·英译汉帮下Have you ever fed the disabled children?No,I haven"t.B have you ever 和 did you ever Have you ever been abroad?可以同义句转换把been换成gone 意思相同吗 请问：Have you ever said something you did not want to say?能换成这 Have you ever had such a pleasant time?把have换成do对不? Have you ever been的ever可换成什么 did you ever 和have you ever哪个对 Did you ever...和Have you ever...有什么区别?什么时候用Did you ever...什么 have you ever helped.Yes,I have .I think helping others you Have you ever、did you ever、do you ever的区别,及答句形式 have you ever asked yourself why children go to school?