Knowing how to ask for information politely is important,isn't it?What it's this

so knowing how to ask for information politely is important knowing为什么用ing形式 Knowing how to ask for information politely is important,isn't it?What it's this Knowing how to ask for information politely is important帮我分析一下这个句子啊啊 so knowing how to ask for information politely is impaotant know为什么用ing形式 how to do the homework,I went to ask my teacher for help.A.Not to know　　 B.Not knowing 　C.Knowing not　　 D.Not known 选项 原因 Knowing how to ask for information p is vKnowing how to ask for information p is very important根据首字母应该填什么单词呢?p开头的 (2/2)money.4 knowing how to ask for information politely is important.5 buy one,get one free! Not knowing how to operate a switchboard,I had to ask the office for help.这句话为什么开头要用Not knowing而不能用Having not known how to ask questions here _how to find the place ,i went to ask policemen.a.Not knowingb.knowing notc.Don't knowd.No knowing ______ how to operate a washing machine,I had to ask my wife to show me the correct proceduresA.Not known B.Not to know C.Not knowing D.Having not known Let's ask Jim.He is certain____ A.to know B.know C.knowing 怎样翻译how to ask?soso ? I know how to ask problem Many students ask f--------- advice about how to learn English根据句意及汉语提示完成单词： ——the answer,you can ask your teacher.A.Know B.To know C.Knowing D.Knows 首字母填空 Having good table manners means knowing how to b______well at the table. knowing how to communicate with others is also a technique we should maste翻译