There is a pen on the desk.(对a pen 提问.)

There is a pen on the desk.(对a pen 提问.) there is a pen on the desk? there is a pen and tow books on the desk.对 a pen and tow boo there is a pen and two books on the desk.还是there are a pen a There is a pen on the desk 同义句转换 there is a pen on the desk 变为复数 this is a （ruler) 对括号提问 the pen is （on the desk） there is a pen 对a 提问 there is a pen.对划线部分a pen提问 There is a pen,a knife and several books on the desk.中on the is there a pen and some books on the desk?肯定回答是yes,there is There 什么a pen and two books on the desk