simple past
The secretary waited in the front office.
The secretary worked at the school.
The secretary, who/that worked at the school, waited in the front office.
OR
The secretary, who/that waited in the front office, worked at the school.
The boy was sitting at the table.
The boy was studying.
The boy, who/that was sitting at the table, was studying.
OR
The boy, who/that was sitting at the table, was studying.
The mother runs errands in the afternoons.
The mother works during the day.
The mother, who/that runs errands in the afternoons, works during the day.
OR
The mother, who/that runs errands in the afternoons, works during the day.
The mother is running errands in the afternoons.
The mother is working during the day.
The mother, who/that is running errands in the afternoons, is working during the day.
OR
The mother, who/that is working during the day, is running errands in the afternoon.
The test will be taken at the end of the semester.
The test will cover the Civil War.
The test, which/that will cover the Civil War, will be taken at the end of the semester.
OR
The test, which/that will be taken at the end of the semester, will cover the Civil War.
The children will be learning responsibility.
The children will be cleaning the house.
The children, who/that will be learning responsibility, will be cleaning the house.
OR
The children, who that will be cleaning the house, will be learning responsibility.
The people went to the block party.
The people moved in recently.
The people, who/that moved recently, went to the block party.
OR
The people, who/that went to the block party, moved recently.
The pedestrian was walking home from work today.
The pedestrian was wearing a red shirt.
The pedestrian, who/that was wearing a red shirt, was walking home from work today.
OR
The pedestrian, whothat was walking home from work today, was wearing a red shirt.
The bees sting anyone who comes close.
The bees protect the hive.
The bees, that protect the hive, sting anyone who comes close.
OR
The bees, that sting anyone who comes close, protect the hive.
The engineer is working for the city.
The engineer is designing bridges.
The engineer, who/that is designing bridges, is working for the city.
OR
The engineer, who/that is working for the city, is designing bridges.
The salesperson will stand the front of the store.
The salesperson will greet customers.
The salesperson, who/that will stand at the front of the store, will greet customers.
OR
The salesperson, who/that will greet the customers, will stand at the front of the store.
The children will be sleeping well tonight.
The children will be playing all day.
The children, who/that will be sleeping well tonight, will be playing all day.
OR
The children, who/that will be playing all day, will be sleeping well tonight.
The passengers flew to their destination.
The passengers traveled to Mexico.
The passengers, who/that traveled to Mexico, flew to their destination.
OR
The passengers, who/that flew to their destination, traveled to Mexico.
The book was sitting on the shelf.
The book was red.
The book, that was red, was sitting on the shelf.
OR
The book, that was sitting on the shelf, was red.
Our teammate leads the warm-up.
Our teammate is the team captain.
Our teammate, who/that is the team captain, leads the warm-up.
OR
Our teammate, who/that leads the warm-up, is the team captain.
The high school student is eating at noon.
The high school student is going home for lunch.
The high school student who/that is eating at noon, is going home for lunch.
OR
The high school student, who/that is going home for lunch, is eating at noon.
The photographer will arrive at the reception early.
The photographer will shoot the wedding.
The photographer, who/that will shoot the wedding, will arrive at the reception early.
OR
The photographer, who/that will arrive at the reception early, will shoot the wedding.
The artist will be earning a spot in the gallery.
The artist will be doing amazing work.
The artist, who/that will be earning a spot in the gallery, will be doing amazing work.
OR
The artisit, who/that will be doing amazing work, will be earning a spot in the gallery.
Students studied in the library in the evening.
Students had exams this week.
Students, who/that had exams this week, studied in the library in the evening.
OR
Students, who/that studied in the library in the evening, had exams this week.
The fish was getting caught in the net.
The fish was swimming with the current.
The fish, that was getting caught in the net, was swimming with the current.
OR
The fish, that was swimming with the current, was getting caught in the net.
The cyclists ride down this road every day.
The cyclists train for competitive events.
The cyclists, who/that ride down this road every day, train for competitive events.
OR
The cyclists, who/that train for competitive events, ride down this road every day.
The new couple is having twins.
The new couple is living in town.
The new couple, who/that is living in town, is having twins.
OR
The new couple, who/that is having twins, is living in town.
The principal will hire you.
The principal will work at the school in the fall.
The principal, who/that will work at the school in the fall, will hire you.
OR
The principal, who/that will hire you, will work at the school in the fall.
The architect will be designing the house.
The architect will be hiring the builder.
The architect, who/that will be designing the house, will be hiring the builder.
The architect, who that, will be hiring the builder, will be designing the house.
The nurse took your temperature.
The nurse worked in the doctor’s office.
The nurse, who/that worked in the doctor's office, took your temperature.
OR
The nurse, who/that took your temperature, worked in the doctor's office.
The secretary was waiting in the front office.
The secretary was working at the school.
The secretary, who/that was waiting in the front office, was working at the school.
OR
The secretary, who/that was waiting in the front office, was working at the school.
The food spoils.
The food is left out on the counter overnight.
The food, that is left out on the counter overnight, spoils.
OR
The food, that spoils, is left out on the counter overnight.
The news station is playing in the morning
The news station is being filmed locally.
The news sho, that is being filmed locally, is playing in the morning.
OR
The news show, that is playing in the morning, is being filmed locally.
The people will explore the town.
They people will move in tomorrow.
The people, who/that will explore the town, will move in tomorrow.
OR
The people, who/that will move in tomorrow, will explore the town.
The doctor will be treating the patients for their illnesses.
The doctor will be working tonight.
The doctor, who/that will be treating the patients for their illnesses, will be working tonight.
OR
The doctor, who/that will be working tonight, will be treating the patients for their illnesses.