from now on

from now on
从今以后，今后
It's due to arrive an hour from now.
从现在起一个小时就该到了。
Don't play with the Zhangs from now on.
今后不要和张家的孩子玩。
Please fill me in on your future plan.
请详细谈谈你今后的打算。
From now on I will try to do better.
从现在起我要尽量做得好些。
We hope from now on there will be more exchanges between our two peoples.
希望今后两国人民之间有更多的交往。
From now on, I will begin to write my book.
从现在起，我将开始写我的书了。

详解：

from...on 是英语习惯用语，意思是“从所述的时间开始而延续的时间未定”。一般都是做时间状语。
1.from now on 是从现在开始，可以用一般现在时，一般将来时，例：
From now on you can work on your own.
From now on I will work harder and harder.
2.from then on是从那时开始，一般指过去的某时间。可用一般过去时，现在完成时（从那个时间点到现在），例:
She never spoke to him from then on .
From then on I have got three toys from my father .

for example<-->from then on