поставьте предложение в Passiv Voice употребляя предлог в нужном месте
He often thinks about her
We looked for her everywhere
People speak much about this film
They sent for Alise
She cares for her baby welll
They always laugh at Tom
We will listen to the teacher attentively
I always wait for my friend for a long time
She asked for this book
He will look for his key
They will speak about this accident long
He never listens to mother advices