Henry travelled to Rome.
Intransitive
(no direct object)
Last week, she tested a driverless car.
A driverless car
Janet said hi to David this morning.
David
Can you help me look my brother after?
Incorrect
Look after = inseparable
I only slept for five hours last night.
Intransitive
Luckily, the car didn't hit the dog.
the dog
Eva emailed her homework assignment to her professor.
Her professor
Leave the pen on my desk please.
Correct
Leave on = separable
My cousin gave me a new phone for my birthday.
Transitive
Eve won't buy a driverless car.
A driverless car
Marie bought him a new smartphone.
Him
The band had to call the concert off due to the rain.
Correct
Call off = separable
Mrs. Rodriguez opened her restaurant in 2017.
Transitive
She arrived safely.
No direct object
safely = adverb
My friends gave me a cake for my birthday.
me
Let's go sign up for the school play.
Correct
Sign up = inseparable and intransitive
The restaurant was opened in 2017.
Intransitive
He bought it for me.
It
They gave them their computer.
Them
I was walking in the forest and I came an abandoned house across.
Incorrect
Came across = inseparable