she must appear in a vright red dress and long black stockings.句中的appear为什么不加s

请问In the play,she must appear in a bright red dress .中的谓语动词appear为什么不用三单后加S she must appear in a vright red dress and long black stockings.句中的appear为什么不加s In the play,she must appear in a bright red dress and long black stockings.这里appear是什么用法.那in the play是不是有点多余 In the play,she must appear in a bright red dress and long black stockings.这里为什么用appear.in the play是不是有点多余 she must appear in a bright red dress.that's what she has to do后半句什么结构?怎么翻译? She ____ appear in a bright red dress and long black stocktings 空里填must 我想知道为啥不填have to?而用must呢?还是说have to也可以使用,只是must更好?She has to appear in. 新概念2的17课中She must appear in a bright red dress and long black stockings.为什么用must而不能用has to? she often appears on the stage as a young girl.she must appear in a bright red dress这两句中一个appear 作为第三人称加了S.但是后面一句当中为什么没加S? judy is an actress she must be about forty years old.but she often appear on the stage as a young girl judy will have a part in a new piay soon this time she will be agirl of seventeen in the piay she must appear in a bright and red dress and long bl 英语翻译she must appear in a bright red dress and long black stockings她必须穿一条鲜红色的裙子和黑色的长筒袜．这里的appear有穿的意思? In the play,she must appear in a bright red dress and long black stockings.关于must的问题个人感觉用have to 比较恰当,因为书上说,have to 是客观的,must 是主观的,显然这篇文章给我的感觉aunt都35了,还这么穿,她是 She must be at least thirty-five years old.In my opinion she() a.has b.is c.must 为什么? ( )She must be in red. No,------.She wears a green coat. A.she is B.she must not C.I do D.I am not she must be in red .no,（ ）she wears a green coatA：she is B:she must not C:I dou't think so.D:I am not She can speak English well._______,she thinks she must study English harder.a.Consequentlyb.In additionc.For instanced.However appear in appear at appear to appear at 有什么区别appear on appear为什么有时变成过去式形式,she appeared to be in her later thirties matlab logical出错logical(x(1).a)(:,1)我是要调用x(1).a这个矩阵的逻辑形式的第1列,结果出错：Error:()-indexing must appear last in an index expression.