这句话的语法对不？

第一句应该改为 ：This is the Contact list
第二句应该改为：I will have amended the Contact list by the time they tell me the information.
但是我觉得换个表达更好，
This is the Contact list.I will amend it as soon as they tell me the information.

动词型 will/shall have +过去分词
系表型 will/shall have been + 表语
将来完成时指预见或计划将来某时刻之前已完成的动作,或已存在的状态.
A 状态完成：表示某事继续到将来某一时为止一直有的状态。

B 动作完成：表示将来某一时或另一个将来的动作之前,已经完成的动作或一获得的经验。
You will have reached Shanghai by this time tomorrow.
明天早上这个时候你就到上海了.
You will have finished this grammar book by the end of this semester.
到本学期末你们就已学完这本语法了．

C 在以if，unless，when，before，after，as soon as等连
词引起的状语从句中，通常都以现在完成时代替这个时态：
I intend to go to college after I have completed my highschool course．
You will like the book after you have read it．

看不大明白,试着改一下.
This is the Contact list.I will amend it after they tell me the information.

是这意思吗? 满意的话请点采纳,谢谢.

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