Yes, in American English we would use "It's better that he know."


2 - Let's wait until tomorrow to tell him.

9 - That's not a good idea.

2- Why?

9 - The sooner he knows the better.

2 - Do you think it'll be too much for him to handle after having heard the other bad news this morning?

9 - No, It's better that he know now.

or: It's better that we tell him now.

or the opposite: It's better that he not know about this until tomorrow.

The present subjunctive used with the third person singular may often go unnoticed, but it is there. I hear it mostly in news broadcasts. I have, by the way, heard the present subjunctive in BE, but it is typically not used in the third person singular in BE. I use the present subjunctive, but I was not always in the habit of taking note of it. I do take note of it now.

http://www.google.com/search?hl=en&i...now%22&spell=1

http://www.google.com/search?q=%22It...UTF-8&filter=0

http://www.google.com/search?hl=en&l...at+he+leave%22