knife is a tool to cut with 为啥要有那个with吗?

knife is a tool to cut with 为啥要有那个with吗? A knife is a tool for cutting with. english is just a tool to communicate什么意思 Dictionary is ______ useful tool.A an B a C / DDictionary is ______ useful tool.A anB aC /D the A knife is a tool for cutting with.基础语法问题knife前面那个a能不能去掉,也就是说它是不是可要可不要的?tool前面那个a呢?再啰嗦一句knife前面的那个a有什么意义呢？为什么可以加？我很罗嗦。- -*** 请问,这句英语语法对吗?language is just a tool of communication not a tool to compare A spade is a tool.如题 9.Piano is a popular ________.A.machineB.equipment C.instrument D.tool English is a useful tool.写作 This tool is a real eye opener. 英语翻译we need a tool to dig 谁来帮我分析一下这个句子的成分?A knife is a tool for cutting with.前面应该是一套主系表,后面呢?“for cutting with”是定语从句?还是补语? 请问这句话with是倒装吗?A knife is a tool for cutting with正常的说应该是with cutting 请问这句话中的with是倒装吗? The knife ____she often uses to cut bread is very sharp.A which B with it C with that D with which this kind knife is cutting metal a.used for b.used to c.usedhe has worked in this factory sineit (build) Eric is using a knife to cut a pumpkin.（同义句）Eric is _____a pumpkin _____a knife.空里面填什么原因，为什么 ___(not let) her cut the cake.She is too young to use a knife. We use a knife ___somethings.a.cut b.to cut c.cuting选什么?为什么