On the desk (lies an old envelope),which contains some photos 桌子上有一只旧信封,里面装着些照片为什么 用lies 而不用 lying 如果用lies 前后不是两个主句吗?

On the desk (lies an old envelope),which contains some photos 桌子上有一只旧信封,里面装着些照片为什么 用lies 而不用 lying 如果用lies 前后不是两个主句吗? there ----------------- an eraser on the desk. There is an apple on the desk改为--- --- --- --- there on the desk there is an apple on the desk同义句. 改错：There has an English book on the desk? ___ ___see an English book on the desk? there is not an apple on the desk 的同义句There isn't an apple on the desk.（填一词）There is -------------------------apple on the desk. ( )Alice is____ honest.She never tells lies.A.an B.on C./ D.the there is an orange on the desk.(对an orange提问)there is an orange on the desk.(对an orange提问)（ 1 ）（ 2 ） on the desk？1=2= there is an eraser on the desk 对划线句提问 an eraser 划线 ( )the baseball on the desk? 英语语法句子结构问题There is an apple on the desk.中,on the desk是状语,an apple是主语,is是谓语,那there是什么? There is an apple on the desk 这句的主语是什么?同志们问一下 There is an apple on the desk .的主语是啥? look!() eraser is on the desk,whose is it?A .A B.An C .The D./ Half of the money on the desk () Tom's.A.are B.isC.an D.be There is no[ ] book on the desk A the B a C an D /rt 改错拉.改错拉.The little girl wrote an ‘U’ and ‘N’ on the desk. -----book on the desk is ----useful one答案是：The book on the desk is useful one.为什么useful前面不能用an或the?