宾语从句改错：mrs jackson says her so that he should be firendly to others.

这里涉及到的是say这个动词的词性．

say是一个不及物动词,后面直接加宾语是不行的.必须先加介词,然后宾语,然后宾语从句.
如上句可以改为:Mrs Jackson said to his son that he should be friendly to others.

或者可以用tell. tell 是及物动词,后面可以直接加间接宾语和宾语从句.
例如:Mrs Jackson told her son that he should be friendly to others.

Mrs. Jackson said he should be friendly to others.

Must be pass tense, because, event already happened.

mrs jackson says TO her son that he should be firendly to others.

mrs jackson said to her that he should be firendly to others.