Last updated: June 2026
English Prepositions: Natural Acquisition via CI
150+ English prepositions — not learnable by rule. CI acquires them as chunks. 200-300 CI hours naturally resolves most preposition errors.
Why prepositions cannot be learned by rules
"In the morning" but "at night". "Interested in" but "excited about". English prepositions are largely idiomatic — not rule-derivable. Only massive CI builds correct collocational patterns.
The chunk approach
Acquire as collocational chunks: "interested IN", "good AT", "arrive AT/IN", "depend ON", "different FROM". Never learn prepositions in isolation. 200 CI hours builds common chunks automatically.
Move the slider: how much of a video at this level do you understand?
Common L1-transfer preposition errors
Russian: "discuss about" (обсуждать о). Spanish: "explain me" (explicarme). Japanese: verb-particle direction. These disappear after 300-400 CI hours as correct patterns replace L1 transfers.
Try comprehensible input now
Real lessons at this level from our free library — pick one and watch.
Core prepositions IN / ON / AT
IN (enclosed): in the box, in London, in 2025, in the morning. ON (surface/time): on the table, on Monday, on the phone. AT (point): at school, at 3pm, at the door. Acquired in first 50-100 CI hours.
CI strategy for preposition mastery
200 CI hours resolves most preposition errors. Accelerate with Anki sentence mining of preposition collocations (not individual prepositions — full chunks only). Self-check writing by reading aloud.
1How much everyday English speech can you follow?
2Can you watch a show with English subtitles?
3How comfortable is a real conversation?
Suggested starting level:
Do I need to understand every word?
No. If you follow the overall meaning — roughly 70–90% — the video is working. Missing some words is normal and your brain fills the gaps from context.
How long until I can speak?
Speaking emerges naturally once you have enough input — often after a silent period of months. Forcing speech too early mostly produces translation and stress. Let understanding lead.
Should I use subtitles?
Use English subtitles as a bridge, then rewatch without them. Avoid subtitles in your own language — they let your brain skip the listening and slow acquisition.
How much should I watch per day?
Consistency beats marathons. Even 15–30 focused minutes daily adds up to 90–180 hours a year — enough to cross a CEFR level. A habit you keep beats an ambitious plan you drop.