Are these chair?chair后面有没有s?

Are these chair?chair后面有没有s? on.what.these.the.are.chair连词成句 these tennis rackets are on the chair.(对划线部分提问）划线的是on the chair 句型 1.They are on the chair 2.These are my frnends9（一般疑问句） 3.Those are my pencil Are these you sweaters?No.____are on the chair behind the desk.A.our B.we c.ours D.US Are these Are these your trousers?Yes,these are, these are his shoes.( )are these ()? there are some m---on the chair Those are chair .(由复数变成单数) Your keys are under the chair.提问 小学英语六年级的连词成句,1、 is 、 this 、 whose 、desk2、 the、 chair、mine、is、over、these、3、trousers、 blue、the、whose、are、4、think 、i、 the、brown、shoes、the、are、twins'5、Kate's 、 on、 the、 swe The books are on the chair对 on the chair提问2.These are my CDs （1）改为否定句。（2）改为一般疑问句。（3）肯定回答。（4）否定回答。3.Are the pictures on the wall?(否定回答）4.Is the CD under the bed?（肯定 Are these your Are these your pencils? These bags are heavy. Are these pens ___? Are these shoes?