Is this grammatical?

The firm concerned the boss with their laziness.

She lent to the teacher a pencil.

We found out about the riot from yesterday morning.

Julia mentioned that we should stay inside.

Frederick arranged the flowers into a heart for his girlfriend.

When the needle goes in, it will only hurt slight.

Teresa explained how to doing the craft.

He is going to succeed in being the strongest man on earth.

You wonder about what you could have.

The priest forgave them the sins they had done.