I'll take an umbrella. It may rain. CASE
I'll take an umbrella IN CASE it rains
The meeting was postponed. There was a power outage. OF
The meeting was postponed BECAUSE OF the power outage.
She couldn't attend the meeting. She was sick. AS
She couldn't attend the meeting AS she was sick.
He opened the window. He wanted to let the fresh air in. ORDER
He opened the window IN ORDER TO let the fresh air in.
Lucy went to the shop. She needed to buy some food. SO AS
Lucy went to the shop SO AS TO buy some food.
Bob is saving money. He'd like to buy a new car. THAT
Bob is saving money SO THAT he will buy a new car.
