Young people nowadays have no manners.
Young people have no manners these days.
I can't understand the psychology of adolescents.
It is no good trying to persuade the boy.
It's no use trying to persuade the boy.
The man knows how to deal with egocentrism.
I can not understand the psychology of adolescents.
The boy seems to know a great deal about plants.
You do not know how to deal with students.
He knows nothing of the world.
That grand champion sumo wrestler uses no technique other than pushing [thrusting] his opponent out of the ring.
The boy is far from a fool.