A2 used to show the person or thing that does something(用于表示动作的施动者)被,由
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The roof of the temple was held up by a row of thick stone columns.
The girl's mother was at home today, being comforted by relatives.
The English were conquered by the Normans in 1066.
The temperature is controlled by a thermostat.
Any painting by Van Gogh is worth a fortune.
A2 used to show how something is done(用于表示方式)
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She cheated in the test by copying from the boy in front.
I don't have any cash on me, so could I pay by cheque?
Whenever I travel by train, I always travel first class.
He managed to stay afloat by holding on to the side of the boat.
The pilot avoided a collision by changing course.
B1 near or at the side of在…旁边,在…附近
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We spent a week by the coast.
He held my arms down by my sides.
He has a house down by the harbour.
She sat reading by the fireside.
A2 not later than; at or before不迟于;早于
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We are committed to withdrawing our troops by the end of the year.
All contributions for the school magazine must be received by 1 August.
We need a firm decision by the end of the week.
I've got to be home by seven.
I aim to be a millionaire by the time I'm 35.
B2 used to show measurements or amounts(用于表示度量或数量)
used to say that something increases or changes with every minute, hour, day, etc. that passes随着每分钟(每小时,每天,等)的过去
describing or showing what happens every minute, hour, etc.每分钟(每小时等)的(变化)
during在…期间
used when describing someone's character, job, etc.本性(职业等)上
If something is all right/fine by someone, they agree that it can happen.同意,不反对
B1 at the side of or (in distance or time) past经过
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I was just passing by, so I thought I'd drop in for a chat.
He tapped Brown on the shoulder as he went by.
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