there are a pen,a knife and several books on the desk.哪错了?

there are a pen,a knife and several books on the desk.哪错了? there are pen ,a knife and several books on the desk.哪错了? There is a pen,a knife and several books on the desk.中on the there is a pen and two books on the desk.还是there are a pen a on ,are ,and,there,books,there,a,pen,the,desk连词成句 There 什么a pen and two books on the desk There is (are) a pen and some books on the desk .是倒装句吗? 改错 There are a pen and tow books on the desk. there is a pen and tow books on the desk.对 a pen and tow boo 高手讲解下英语.there are many books and a pen on the desk中的on the d There are some books and a radio on the desk. There is (are) a pen and some books on the desk 此句中,为什么既可the