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 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 ___help the people in the snowstorm in the south made him worried.A not known how to B unknown what to do to C His knowing not how to D his not knowing how to Not knowing how to purr is a great handicap这话什么意思 I swung around to his back,not even really knowing how I managed it, forgive me for not knowing how to joke,to say you will take it seriously这是病句么 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 Not knowing what to do,he went to his parents for help.为什么是not knowing不是no knowing? She stood there____what to do.A.knew notB.knowing notC.not knowD.not knowing ____,he asked the teacher .为什么选BA.Not knew how to do B. Not knowing what to do C.Didn't know what to do D. Because not know how to do it. The old lady ,not ______ how to surf the Internet ,decided to learn it from her grandsonA.know B.known C.knowing D.to know ______ 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 so knowing how to ask for information politely is important knowing为什么用ing形式 it`s not good ____( learn) english by heart without knowing how to use them 答案是learning为什么不能用to learn? “the foolish man stood there not knowing what to do”为什么用“knowing”? 分析英语句子成分 Not knowing how long the rain would last.Are they causing you to give up what y分析英语句子成分Not knowing how long the rain would last.Are they causing you to give up what you want to do?You should know that you cann In order not to o—— people,we need to learn how to be polite. _how to find the place ,i went to ask policemen.a.Not knowingb.knowing notc.Don't knowd.No knowing Knowing what you know,how could you not这句话怎么翻译比较合适~