1.他退团已经6年了。2.他们支持此事。3.他们打算去购物。4.很有帮助。5. Where have you been since I saw you last time?6.How long has it been since I visited your mother last time?7.She has been working in the bank since she left school.8.He meant to put it off till next year that he would move to Beijing.9.They are for it.10. He was charged with the crime of murder.