not to eat
ask sb.(not) to do sth.表示“要求/请求某人(别)做某事”.
to sing
hear sb do sth.表示“听见某人做了某事”,其被动语态是:Sb.be heard to do sth.
repaired
have sth done 表示“让某事/某物被做”,这里用过去分词表示被动.
not to eat
ask sb.(not) to do sth.表示“要求/请求某人(别)做某事”.
to sing
hear sb do sth.表示“听见某人做了某事”,其被动语态是:Sb.be heard to do sth.
repaired
have sth done 表示“让某事/某物被做”,这里用过去分词表示被动.