Into and Out Of
Master into (movement from outside to inside an enclosed space) and out of (exiting an enclosed space), and distinguish both from the static preposition 'in'.
Into and Out Of: Entering and Exiting Enclosed Spaces
The into/in distinction is the single highest-frequency movement-preposition error in learner English. Cambridge Learner Corpus data shows that 'walked in the room' (instead of 'into the room') appears in over 30% of B1 writing samples that use this construction. The error is caused by L1 transfer: many languages use one word for both 'in the room' (static) and 'into the room' (movement). English requires a separate form for directed motion.
Into — Movement Entering an Enclosed Space
Use into when someone or something moves from outside a bounded space to inside it:
He dived into the lake from the high rock.
She stepped into the elevator and pressed the button.
She reached into her bag and pulled out the keys.
Out Of — Movement Exiting an Enclosed Space
Use out of when someone or something moves from inside a bounded space to outside it. Do not use 'from' for this — 'from' describes origin, not the act of exiting:
She climbed out of the pool.
✗ He got from the car. → ✓ He got out of the car.
Into vs In: The Static/Motion Contrast
She got into the car. (motion — entered the car)
The keys are in the drawer. (static)
He put the keys into the drawer. (motion)
Common Mistakes
✗ The dog jumped in the swimming pool. → ✓ The dog jumped into the swimming pool.
✗ He got from the car and walked to the office. → ✓ He got out of the car and walked to the office.