老师好，

今天周五明天老师会让Jane在即将来临的周末做一些事情，下句时态对吗？

Jane will do everything on the weekend as the teacher asked on Saturday.

修改为以下句子：

Jane will do something as she was told on Saturday.

方式状语从句存在主将从现吗，如若把句子改成：

Jane will do everything on the weekend as the teacher will ask.

意思是不是就变成先做再要求了？

修改为以下句子：

Jane did something as she had been told to do by the teacher .

The next July, the lady will talk about why the man founded this new company at the beginning of the next April.（此处宾语从句用过去时对吗？）

修改一下句子

The next July, the lady talked about why the man had founded this new company .

They will be thankful for whatever help you offer/offered them.（这两个选哪个呢？）

修改一下句子

They will be thankful to you for whatever help you offers them.

They will be grateful to you for whatever you offer them.

老师 很感谢您的回答。

但是第三句the next july后主句用过去时不合适吧

此外方式状语从句里不存在主将从现吧

您的第一个句子During the coming weekend, he will do everything as he was asked.(如果今天是周五说这句话合适吗？）

继续跟踪回答如下：

(1)The next +(年/月份） 是相对于过去某一时间为起点的“第2年/2月份）（句子使用过去时态）

The next year the work went ahead on a large scale.
第二年这项工作就大规模进行了。

The next year it swallowed another free country.
第二年它又并吞了另一个自由国家。

(2)next +（年/月份）是相对于现在时间为起点“明年2月（句子使用将来时态）

A new system of taxation will be brought into effect next year.

新的税收制度将于明年实行。

Spending too much now will mean a shortage of cash next year.

现在花钱过头，来年就要缺钱。

Next year is a presidential year.
明年是总统选举年。

A superhighway will be constructed next year.
明年将要修建一条超级高速公路。

I'll be thirty next year.
明年我就满三十岁了。

I will be no more a senior high school student come next July.  

当明年七月来到时,我就不再是高中生了.

 And, next July, we will begin a transition to Afghan responsibility.  

并且, 明年七月, 我们将开始对阿富汗的责任过渡.

The two banks will consolidate in July next year.  

这两家银行明年7月将合并.

 Harry Potter and The Phenix will be show in July next year.  

哈利·特与凤凰会的密令》将于明年7月在英国和美国上映.