Do you have a pen to write with?帮我解释哈句子后面为什么要加with,什么是后不加这样的介词

Do you have a pen to write?改病句 Do you have a pen f______? Do you have a pen pal? Do you have a pen I want to ( ) a letter to my parents I have a pen. 改成疑问：Do you have a pen?和Have you a pen?哪句对? do you have a pen? have you got a pen?哪个对? Do you have a pen to write?（改错）最好要说明原因 英语翻译Have you got a pen friend?Do you think pen friends are a good idea? have,do,a,you,pen,pal(?)连词成句 Do you have a pen 的中文意思是什么? do you have a new pen pal,lucy?怎么回答 课文do you have a pen pal的全部录音, Do you have a red pen()a blue pen?but or and Do you have any pens?I need a pen to write _______ 我知道要用with但为什么呢? want,a,do,to,you,pen,pal,heve连成疑问句 Do you have a pen?的回答是yes,i do 还是yes I have Have you got a pen would you like to等于什么是He would like to have a pen pal 等于He[ ][ ]have a pen pal.