I will not tolerate this behaviour any longer. Do I make myself clear? 我不会再容忍这样的行为了。我的话你明白吗?
If you speak to me like that again, you'll be out of the front door before you know what's happening to you. Do I make myself clear?
I want this floor so clean I could eat my dinner off it. Do I make myself clear?
If you make any trouble for me, you'll get it back ten times worse. Is that clear?
You are not to visit her again. Is that clear?
See also: clear adjective (ABLE TO BE UNDERSTOOD)