- start - begin - commence
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My father started work when he was ten.
The prisoners plan to begin a hunger strike today.
\I commenced a round of visits.
There is no difference in meaning between these words, but commence is a formal word. You do not use it in conversation.\The past tense of `begin' is began, not `beginned' or `begun'.\Botanists everywhere began a dramatic revision of their ideas.
The past participle is begun.\The company has begun a programme of rationalization.
◊ used with other verbsRalph started to run.
He started laughing.
I was beginning to feel better.
\We began chattering and laughing together.
Note that you do not use an `-ing' form after starting or beginning. You do not say, for example, `Now that I feel better, I'm beginning eating more'. You must say `Now that I feel better, I'm beginning to eat more'.\After commence, you use an `-ing' form. You do not use a `to'-infinitive.\He let his oars sink into the water and commenced pulling with long strokes.
◊ used as intransitive verbsStart, begin, and commence can all be used as intransitive verbs to say that something happens from a particular time.His meeting starts at 7.
My career as a journalist was about to begin.
\He had been held for 9 months when his trial commenced.
◊ special uses of 'start'\You use start to say that someone makes a machine or engine start to work.He couldn't get his engine started.
\He started the car and drove off.
You use start to say that someone creates a business or other organization.\He scraped up the money to start a restaurant.
In stories, start is used to say that someone starts to move in a particular direction.Ralph started back to the shelters.
\They started down the street together.
Useful english dictionary. 2012.