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Both mean "to commence", but "start" is more everyday and physical; "begin" is more formal and used for processes.
Side-by-side comparison
To commence something, especially something with structure or duration. More formal than "start". Common in written texts.
The meeting will begin at nine sharp. Please be on time.
She began to cry when she heard the news.
Let us begin with a brief review of last week's material.
To commence something. More everyday. Also: to set in motion (an engine, a physical process).
Can you start the car? The engine is not turning over.
I always start my day with a cup of coffee and the news.
The race will start in five minutes. Runners, take your positions.
Common mistake
In most contexts they are interchangeable. The only important difference: "start" is the only correct choice for machines and engines ("start the car", "start the engine"). "Begin the car" does not exist.
Trick to remember it
- •Is it a machine or engine? Always "start".
- •Is it a speech, event, or process? Both work, though "begin" sounds more formal.
Quick rule
- •Machines and engines: always "start".
- •Everything else: interchangeable.
- •"Begin" sounds slightly more formal.
Did you know?
"Begin" has an irregular past: begin / began / begun. "Start" is regular: start / started / started. This illustrates a broad English pattern: Old English verbs tend to be irregular (begin, sit, stand, run), while Latin or Norman-origin verbs tend to be regular (start, continue, finish). English has been gradually replacing irregular verbs with simpler regular alternatives for centuries. In 500 years, "begin" may disappear from everyday speech entirely.
Practise what you learned
Exercise 1 · Pick the right one
She couldn't _____ the car. The battery was dead.
Exercise 2 · Pick the right one
The film _____ with a beautiful shot of the mountains.
Exercise 3 · Form the word
Related word pairs
"Do" is for individual sports and activities; "play" is for team sports and games with opponents.
"End" is to stop occurring (event or situation); "finish" is to complete a task all the way through.
'Start' and 'begin' accept both gerund and infinitive with no meaning difference, except with stative verbs or in continuous forms.
"Above" is at a higher level without contact; "over" implies covering, movement, or crossing.
Bryan López
Founder of SpeakUP Academy