WHO
John helped me with my homework.
It was John who helped me with my homework.
The dog chased the cat
What the dog did was (to) chase the cat.
She wrote a novel
What she wrote was a novel.
The sun rises in the east.
What happens is that the sun rises in the east.
She won the competition.
It was she who won the competition.
He ate the cake
The students enjoyed the field trip.
What the students enjoyed was the field trip.
The power went out during the storm.
What happened was that the power went out during the storm.
The dogs barked all night.
It was the dogs who barked all night
The children play in the park.
What the children do is (to) play in the park.
They planted flowers in the garden.
What they planted in the garden was flowers.
The train arrives at the station every hour.
What happens is that the train arrives at the station every hour.
The children played in the park
It was the children who played in the park.
She sings beautifully.
What she does is sing beautifully.
The thing that surprised me most was her kindness.
What surprised me most was her kindness.
When the temperature drops below freezing, water turns into ice.
What happens when the temperature drops below freezing is that water turns into ice.
The student who studied hard passed the exam.
It was the student who studied hard that passed the exam.
The detective who investigated the crime discovered the truth.
What the detective who investigated the crime did was discover the truth.
The most important thing for students is to develop critical thinking skills.
What is most important for students is to develop critical thinking skills.
Although he studied hard, he failed the exam.
What happened was that he failed the exam, although he studied hard.