boil empty sharpen的过去式?

boil empty sharpen的过去式? 一些初二英语的问题,谢啦!写出下列动词的过去式和过去分词be、see、air、clean、open、sharpen、boil、answer、turn on、listen to、ask、type、wash、walk、dust、paint、empty快点啦，谢谢 sharpen的意思是什么? sharpen的过去式 sharpen,boil,turn,ask,wash,paint,dust,answer,type,walk过去式和过去分词 过去分词 excuse meet am are see catch come give shut open air put dust sweep empty read sharpen climb run tyre eat clean cook drink shine walk fly sleep shave cry wash wait jump swim work make paint listen drop shop send take find boil ask lift l boil的过去式 boil的过去式 英语中几个单词的复数形式和过去分词单词：air、clean、empty、sharpen、turn、water、repair、dust、correct、shut每个单词都要复数形式和过去分词,拜托要写清楚一点啦, 用以下动词的一般过去时态填空call enjoy ,climb,arrive,watch,sharpen,listen,wash boil open airi was ill last night so Mum ___ the doctor,the children ___ themselves in the park yesterdayyesterday afternoon the boys __ t boil the milk是什么意思,boil是谁的过去式或是过去分词,还是boil不是谁的过去式或过去分词 sharpen是什么意思 listen,empty的过去式, empty 的反义词 empty的反义词 empty 的反义词是什么? empty的意思是什么? empty的意思