为什么一把刀用a knife 就可以了 但一杯茶要a cup of tea 是不是不可数名词前面不能有a an 只能用这类短语吖 a 的意思有什么有 一包 一个..

为什么一把刀用a knife 就可以了 但一杯茶要a cup of tea 是不是不可数名词前面不能有a an 只能用这类短语吖 a 的意思有什么有 一包 一个.. 苹果加一把刀 =什么英语单词apple knife(A knife) (1/2)A knife and fork 【 is】 on the desk为什么用is而A knife and a fo knife are using for cutting things 为什么用knife 谁有一把小刀?我有一把小刀用英语怎么说—who has a knife?—I have （ ）A.it B.this C.one D.that 应该选A还是B 手上拿着一把刀.请问是in one of his hands还是in hand他奔跑着,手上拿着一把刀.He was running with a knife in hand.或是He was running with a knife in one of his hands. Pass me a knife to cut the bread with为什么要用with 为什么说色字头上一把刀? If a knife is sharp, it is easy to cut something with. 后面为什么要加with?去掉可以么? 为什么玻璃杯忽冷忽热是容易开裂?为什么放一把金属勺子就好多了?急 快 他用一把刀把这个苹果切为两半 He cuts the apple ___ ___ ___ a knife In western countries,people usually have their meals____ 用with a knife还是with knife 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。- -*** liveing on a knife she bought a knife from the shop with ____ to peel an apple.为什么用which而不用that 一把刀为什么刀刃上有孔 非谓语动词 名词+介词短语A robber burst into the room, knife in hand.后半句．a knife in his hand可以么?还是前面必须加with才能这样用?谢谢! a knife and a fork 动词用单数还是复数