extrinsic

"My friend told me there was something in the box, but I didn't know what it was yet. "

"My sister is learning to play the guitar. "

"Her motivation to finish the project was strong because she wanted a good grade. "

"Packing for the camping trip, we realized we had plenty of inessentials like extra blankets and fancy cooking tools, but we forgot the tent poles. "

"She is getting her daughter a puppy for her birthday. "

"I thought they were joking at first, but it seemed they were genuinely interested in the talk about glaciers."

"I need to study my biology notes."

"The shop's external displays were designed to attract customers. "

"if I make a promise, I always stick to it;  he broke his promise"

"The teacher gave the students allowance to finish the project early if they worked hard. "

"Where does this document belong?"

"The different subjects in school are separable; you can take one or more without having to take them all. "