by
🔊 Pronunciation
/baɪ/
📝 Preposition Type
Type: preposition
Core meaning: proximity or means/agency
Can function as: preposition, adverb, particle
📍 Spatial Meanings
next to, beside, near
object A positioned adjacent to object B
The cat sat by the fire
There's a coffee shop by the station
Stand by me
past, through, along
He walked by the window
The train rushed by
⏰ Temporal Meanings
not later than a specified time
Please finish this by Friday
The package will arrive by noon
Temporal Phrases
by now: at this point in time
“They should have arrived by now”
by then: at that point in time
“By then everyone had left”
by the time: at the point when
“By the time we got there, the show had started”
💭 Abstract Meanings
Agency means
expressing agent, means, or method
painted by Picasso
send it by email
succeed by working hard
Agent passive: written by Shakespeare, directed by Spielberg
Means transport: travel by bus, go by air, send by post
Means method: by chance, by accident, by working together
Means communication: contact by phone, order by mail
Other abstract
measurement, multiplication, division
sell by the dozen
multiply by two
🔗 Complement Structures
Noun phrase
Structure: by + noun
by car by accident by noon
Articles: no article with means of transport: by bus, by train
Pronoun
Structure: by + pronoun
by myself by itself
Gerund
Structure: by + verb-ing
by working hard by studying regularly
Clause
Structure: by + wh-clause
by what she said by how they behaved
💬 Fixed Expressions & Collocations
Idioms
“by heart” – from memory (neutral)
“by and large” – generally speaking (formal)
Collocations
Verb + prep:
Obligatory: swear by, stand by, pass by
Common: impressed by, surprised by, shocked by
Adj + prep:
Common: amazed by, concerned by, puzzled by
Noun + prep:
Common: increase by, decrease by, reduction by
⚠️ Common Errors
❌ by walk→✓ on foot
special case for walking
Common for: many languages use equivalent of 'by'
❌ by the bus→✓ by bus
no article with means of transport
❌ by to work→✓ by working
requires gerund, not infinitive
Medium impact
❌ written from Shakespeare→✓ written by Shakespeare
agent in passive requires 'by'
❌ by 5 years→✓ for 5 years
duration uses 'for', not 'by'
⚖️ Contrasts with Similar Prepositions
In vs vs vs on vs vs vs at
Spatial: by indicates proximity rather than position
Temporal: by indicates deadline vs. point/period
Abstract: by indicates means/agent vs. location/state
Other vs contrasts
Key difference: by = alongside; through = penetrating
🌍 Etymology
Origin: Old English 'bi', from Proto-Germanic *bi
Original meaning: “near, around, about”