英语语法1.Now we are not allowed to touch it.这里为什么用not,而不用don't去

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英语语法
1.Now we are not allowed to touch it.
这里为什么用not,而不用don't去否定allow?allow是动词阿.
2.It is being repaired by a friend of my father's
being在这里是什么意思?
repair by sb.是固定搭配么
后面的a friend of my father‘s为什么这样用?
能不能改成a friend of my father或者My father‘s friend
这几句的意思相同么?
3.wiil如果是第三人称要不要单三?

1.这里是被动意义：我们不被允许触碰那东西. be done 被动语态.
2. be repaired 也是被动语态结构, by sb.是介词短语做方式状语.
a friend of my father's=my father's friend ,前一种更重于强调感情色彩,of 后的名词或代词都必须用所有格,不可用a friend of my father；后一种表达较平淡.
又如： a book of Peter's 一本属于Peter的书
a bike of mine 一辆属于我的车（不是别人的）
3.will在表达将来时态时,无论什么人称,都是will.

Now we are not allowed to touch it还原 Now we are not allowed to touch it是什么时态 Now we are not allowed to touch it.为什么要加to we are not allowed to touch it,we touch it A mustn't Bmustn' we are not allowed to touch it=we mustn't touch it we are not allowed to touch it we 括号 touch it 问用mustn't 还是ha Now we are not allowed to touch it.不许我们再动它. We are not allowed to touch it.We__touch it A.mustn't B.must we aren’t allowed to touch it.这句话为什么用被动语态啊? walking dogs is not allowed 为什么用is 不用are? would you please not pass him zhe doll?中为什么用not,而不用don't 用“weare allowed to和we are not allowed to”造句各三句