有这样一个医生 THERE IS A DOCTOR怎么样

有这样一个医生 THERE IS A DOCTOR怎么样 were there.there were_____ no air,there would be no sound.a.were there b.there were c,is there d.there is分析；答案是a我就是不知道a,和b有什么区别,为什么一个必须在前,一个必须在后. 英语There be 句型后面必须接介词短语吗例如:There is a bird in the tree有没有there is a bird.这样呢? there is a cup on the table 有一个杯子在桌子上,想这样的一般的描述的句子是什么时态呢 在那边有一头奶牛,他这样表达； （ ）is a cow over there. What flowers____in the garden?A:is there B:are there C:there is D:there are “___a river near here?” A.Are there B.There is C.There are D.Is there Is there _____ in?Is there _____ in?A.somebody B.anybody C.nobody D.no one就是这样说理由 那里有一个女孩在笑用英语说是there is laughing a girl还是 there is a girl laughing? 你想知道Lucy是不是个医生,这样问Bob:Lucy is a doctor,________ __________? There is a No.2 trolleybus and a No.24 bus_____will take you thereA.both B.either C.all D.any说either是两者其中一个的意思.那么这样翻译不是应该选A了么? 关于There be句形的问题有一道题是这样的There ＿ a knife and a fork on the table.A.seems to be B.seem to be C.is seeming to be D.are 为什么不选B前面不用加is?还有答案seem为什么加s,还有There be句型单复数的确定 有这几个单词,需要连成一个句子：is there a letter for me yes there is 关于英语的一些知识有There is going to have,is going to have visited,there will have is going to have这样的句式吗,后面there will have后面加一个逗号，还有 is going to have a meet where____a will,there is a way.A.there has B.is C.there is D.has there There is nobody in the office ,( A.isn't there B.aren't there C.are there D.is there 会不会有这样的句子：There is a blackboard and two holes (on) the wall.若有,打括号处是填on 还是in 可能有的同学曲解了我的意思,我是在《英语奥林匹克》上看到这样一个句子:There is a blackboard and some p 一道小学数学逻辑推理题（有追加分）有A,B,C,D四个朋友住在同一个地方,其中一个是民警,一个是木匠,一个是医生,一个是农民.一天A的儿子病了,去找医生,医生的妹妹是C的妻子,农民没有结婚,