there is a pen.对划线部分a pen提问一哈就忘记怎么说了

there is a pen.对划线部分a pen提问一哈就忘记怎么说了 It is a pen .(对划线部分提问`划线部分是:a pen) there is a pen in the pencilbox对a pen 划线提问对句中的a pen 划线提问啊 划线部分提问 There is a pen in the pencil-case.(划线部分是a) This is ( a pen) in English ? 对划线部分提问 This is a pen.对划线部分提问 ___ ___? 对划线部分提问 The letter is from a pen friend 对a pen friend提问快 There is a cat under the tree.划线部分是a.对划线部分提问 There is a noticeboard in my classroom.(对划线部分提问)a noticeboard是划线部分 There is a mouse in the house.划线部分是a mouse 对划线部分提问 her father is waiting for a bus there 划线部分：a bus 对划线部分提问 -------is it?It's a black pen.(对划线部分提出问题） The pen is in the backpack对划线部分提问 The pen is (five yuan)(对划线部分提问） there is a pen 对a 提问 The pen is blue对划线部分提问（划线部分为is blue） there he is.(对划线部分提问) This a red pen.针对a red pen 怎样提问（也就是对划线部分提问）错了，是This is a red pen.