those gril's are,those are office?those grils are very lazy.those are office assistants.从语法上讲哪句是错的?为什么?其实2个句子都是对的。只是我不清楚those grils are very lazy和those are grils very lazy有什么原理区别，those are grils very lazy不是和those are office assistants一样吗？但是课本说我的those are grils very lazy是错的。

those are office assistants。（错的）
改正：those are assistants of the office .
office 不能作形容词，不能修饰assistants

其实2个句子都是对的。只是我不清楚those grils are very lazy和those are grils very lazy有什么原理区别，those are grils very lazy不是和those are office assistants一样吗？但是课本说我的those are grils very lazy是错的。能解释下吗？
those grils are very lazy正确。
those are grils very lazy错的，先假设存在。
those are grils是完整句子。 very lazy是后置定语。
但不这么用。
要说成：those are grils who are very lazy.
those are grils very lazy不是和those are office assistants一样吗？
这个可不一样。
those are office assistants
office assistants
办公室助理，是一个词的。这句子和those are students 才是一样的。
those grils are very lazy。
those are office assistants。 好象没错的。
都是主系表结构简单句。

第二句错，those这个词后面必须有定语。
e.g：Those who are beautiful are models。（那些漂亮的人是模特）

不考虑标点等的话，句子是没错的

those grils are very lazy.
those are office assistants.
的确都是对的.
都是系表结构的句子.BE动词是常见的系动词.表语由形容词和名词词组担任.就像上面两句一样.
those are grils very lazy是错的.因为very lazy是形容词短语.只能作定语或表语.定语是修饰名词的.所以这句只能改成 those are very lazy.或.those are very lazy girls.
建议你看两个东西.一个是句子成分.一个是系表结构.

第二个最好用THEY
girl写错了
office 不是a.