I have beent to Beijing for three times.I have been to Shanghai for once.这两句话对么?是不是不能加for 为什么不用加for啊?

I have beent to Beijing for three times.I have been to Shanghai for once.这两句话对么?是不是不能加for 为什么不用加for啊? I have beent to Beijing for three times.I have been to Shanghai for once.两局中的for可不可以省略 Both Jane and Jack have been to BeiJing(改为否定句） ____Jane nor Jack____ beent to BeiJin Both Jane and Jack have been to BeiJing(改为否定句） ____Jane nor Jack____ beent to BeiJin 自学英语,请帮我看一下这几个问题.I have never had a bath.我没来没洗过澡.I have ever been to Paris.我从来没去过巴黎.以上两句中的 never 和 ever能相互替换吗?错：I’ve left Beijing for 3 days.对：I left Beij （1） 介绍：a.I have already finished my homework.Have you found your pen yet?Ihave already finished my homework.Have you found yourpen yet?I haven’t had lunch yet.b.He has just come back from Beijing.c.a)—Where is Tom?---He has gone to Beij 根据句意及单词首字母的提示补全所缺单词1.Does your father often d_____ his car to travel?2.-where does your mother w_____?-In a shoe factory3.I'm tired.so i want to l______ down and have a good rest.4.may be they will l_____for beij I have to love i want to have I have to cook I have noting to I have been to. I have to deceive I have to[ ] .I have to get to the chair[ ] 把下列句子合并为含有宾语从句的主从复合句Does Mr Brown enjoy living in china?Could tell me?No news is good news .He tell us.Who invented Tv set?I donot know.When did the train leave I wanted to know.Does it cost much to fly to Beij 画（ ）部分提问.（改成特殊疑问句）1.I will go to Beijing (on business) tomorrow.2.They will come back to (china) (by air).3.She will come go to the park [(two) times a week].4.He will taik with (you) on phone.5.(They) will be (in Beij I HAVE TO GO HOME I HAVE TO GO HOME Have lost you,I have nothing,to