为什么第一个first和第二个first用法不一样,一个有定冠词the ,一个后面加to ,为什么When did people first begin to use stamps?Who was the first to think of this idea?

为什么第一个first和第二个first用法不一样,一个有定冠词the ,一个后面加to ,为什么When did people first begin to use stamps?Who was the first to think of this idea? It is in this very village____she will build her first school,___inspires everyone to help her.为什么第一个填that,第二个填which first step和first Smith,Miller,Tony,Kate,Mary,Alan,Paul,Green,Gina是分类各三个,是男名还是女名还是什么第一个Last name第二个Boy,s first name第三个Girl,s first name各三个 In 1929,three years after his flight over the North Pole,the American explorer,R.E.Byrd,successfully flew over the South Pole for the first time.为什么第一个用flight,第二个用flew. 英语定语从句与强调句.it is in this village,()Mary was born 35 years ago,()she will build her first school,()inspires everyone to help her.为什么第一个空后是定语从句?与第二个空有什么区别 ”我是第1个”的英语是I'm first 还是要在first前面加一个the? you must let you mother know first和you need let you mother know first 第二句错误,为什么 who can compare the two sentence1.she was the third to arrive2.he was among the first to arrive薄冰语法说第一个句子的third是表语,第二个句子的first是作宾语.第二个句子的结构不是主语+连系动词+表语吗?怎么first 第一个和第二个 first first first first first first first “first