..  It must be said that this kind of approach is very tricky.
This approach is rather tricky, to say the least.
This kind of approach is easy, and not tricky at all.
There are three people in this picture.
They don't have work ethic.
A crowd watches a football game.
I have never been married and do not have any kids.
The car I have right now has never had mechanical problems.
Three cats are curled up on a sofa.