Question

There are three boooks,all of that are borrowed from the library. 这样对吗？还是要把that改为which

Answer 1

1. 如果中间是逗号，则必须改成：

There are three boooks, all of which are borrowed from the library.

因为该关系代词代替先行词(three) books，在从句中充当介词of的宾语并紧紧跟着其后，所以只能用which.

2. 如果中间是句号或者还有其他连词，则可以说成：
There are three boooks, and all of them are borrowed from the library.
或：There are three boooks. All of them are borrowed from the library.

Answer 2

改为which，这里of后不能用that，并且books应用these