when to start and where to go camping hasn't/haven't been decided 是用hasn't 还是haven't?

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• when and where 做主语when and where these pictures will be sent out ________yet.A.haven't been decided.B.hasn't been decided如果把these pictures 改为this picture答案有变化吗?
• 英语翻译1 【 他有多久没来这里了?】我这么写的话,How long hasn't he come here 是否可以呢?句型,语法是否正确?how long 记得,在完成时时态 疑问句中,how long是 不能和短暂动词连用的,这里的 come 就是短暂动词这个句子用了 否定,haven't【 现在完成时 的 否定句 句子,谓语动词 如果是短暂动词,则可以 和 一段时间的 状语连用,】这个知识点,清楚我上面写的 疑问句子 能用 how long 提问不?这样的疑问句 算什么疑问句?否定疑问句吗?网上搜到一些 How long haven't / hasn't + 主语 + 谓语,应该是有这样的句型.呵呵咨询了几个朋友,有说 应该把 come 改成 been How long haven't you 【been】here How long haven't you come here How long haven't you been here 两个表达 那个才是对的?还是说 都是可以的呢?How
• When and where go for the holiday hasn't decided.为什么用现在完成时?
• when to start and where to go camping hasn't/haven't been decided 是用hasn't 还是haven't?
• when and where the meeting will begin______be decided.请问是用hasn't 还是用haven't 请说明理由.
• they have discussed it for days,but when and where to hold the New Year's party still ___yet.A haven't been decided B hasn't been decided答案是B,我选A了.为什么谓语动词用单数啊?
• 关于must的反意疑问句She must have been there for a long time,____ ____ 某上面有这样的说法：陈述部分有must have且没有具体的过去时间状语的疑问句,疑问部分可以用haven't 主语?或didn't 主语.eg)：You must have studied English for three years,haven't you?/ didn't you?你一定读过三年英语,如果强调动作的完成（一般没有明确的过去时间状语）,一般用haven't 主语,但有时不是强调动作完成,是表示对过去肯定的猜测,此时就可以用didn't 主语.如You must have enjoyed yourself,didn't you?你一定玩的很开心,此时不表示动作完成,故可以用didn't you?就此题来讲是用haven't she还是hasn't she?（当然用didn't she也是可以的吧.）
• when and where的题问句谓语动词是单数还是复数?看文章,做题的时候既看到有单数又有复数,有点纠结,什么时候要单数,什么时候用复数?比如We will hold an English contest,but when and where ( )yet A hasn't been decided B haven't been decided我老觉的是单数,但就是不懂为什么,还有最好告诉我什么时候用复数,有一个例句是最好啦
• 英语翻译
• 1996乘19951995减1995乘19961996