put in/put on/put in on

asker   Thu Sep 17, 2009 8:43 pm GMT
Is this sentence correct?
You have to put some serious effort in on this.
or is this one correct?
You have to put some serious effort in this

If you want to say put effort, should you use 'in' all the time or does it depend? If it is latter, how?
Shaun   Thu Sep 17, 2009 9:56 pm GMT
The first one is better.

Even better - You have to put some serious effort into this.