is,a,there,pencil-case,in,bag,my(.) a,forest,the,in,there,is,park(?)是两个句子，第二个是（做否定回答）

there is a pencil-case and some There is a pencil There is an egg. There is a pen and a pencil 还是There are a pen and a pencil This is a pen,and ____is a pencil over there There is a pen in my pencil case改为I () a pen in my pencil case What ________in my pencil-box?There is a pencil,a pen and an easer in it. There is a pencil in her hand.(同义句)（ ）（ )a pencil in her hand. There is n______ but a rencil in my pencil case. there is a pencil in her hand 同义句 there is n but a pencil in mypencil-case. there is a pencil sharpener on the desk改成疑问句 there is a pen in my pencil-box.there is an apple on the table. There is a desk in his bedroom.On--desk there is--pencil-box.填冠词 there be句型怎么 变疑问句和否定句 there is a pencil on the desk two pencils in my pencil-case a piano in themusic room There is和there are what is in your hand now?回答there is a pencil.请问为什么用there is不用this is There is a knife in my pencil-box.对划线部分提问There is a knife in my pencil-box.划线部分为a. What ( ) in the pencil-box?A.is B.is there C.are