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

I_______buy a new pen because there there is no pen in my pencilcase. There is a pen in my pencil case改为I () a pen in my pencil case a pen is there in bag the 连词成句 There is a pen in my bag.【改为一般疑问句】 There is ( ) “P,( )“E”and ( )N in pen.(a/an) There is a little ink in his pen and little ink in her pen.Whose pen do you borrow? 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 there is a pen in my pencil-box.there is an apple on the table. There is ( ) old pen in the box there is no flash in the pen 如何使用there is和there are比如说：there( )a desk in the classroom.there ( ) no ink in my pen. 3、 There is a pen in your hand isn’t there? 3、 There is a pen in your hand isn’t there? 这个句子是否要用完全倒装?There is a box in which is a pen 还是 There is a box in which a pen is.如果把the pen is中的＂is改成＂lies呢? there is a pen 对a 提问 There is a pen and 2 pencils in the pencil-box.(就a pen and 2 pencils 提问） what's in the pencilbox?回答时用There is a pen.还是 It's a pen.并解释为什么. 可以说There is a pen here吗