I Vo.t are going to hear a news broadcast. Before you listen,look at ...

2 Prepositions of time
At, on andin
Ar is used:
c for a point of time:
... at the start of her ettennpt to sail alone
across the Pacific.
r' for the time of day:
at six o'clock, at dawn, at lunchtime
I for seasonal holidays:
at Christmas, at Easter
r for the following expressions:
at the weekend, at first, at lest, a.t present
(= now), a.t the moment (= now), at times
(= sometimes), at once (= immediately)
On. is used for dates and days (including
special days):
on Monday, on 3rd December (note that we
say: on the third of December), on New Year's
Day, on Christmas Day, on my wedding
anniversary
In. is used for all or part of a period of time:
in the afternoon, 'in winter, in the twenty-first
century, in the Middle Ages
By andu.ntil
By means that something happens not later
than, and possibly before, the time mentioned:
,.. she sill intends to be in Chile by the end
of the year. (= at the end of the year, or
possibly before)
Can we finish this worle by four o'clocle? (= not
later than four o'clock)
Until means that something continues up to,
but not later than, the time mentioned:
,,. part of the motorway will remain closed until
this afternoon. (= it will open this afternoon)
Until is often used with a negative, meaning
'not before':
We can't eat until all the guests arriue. (= we
can eat when they are all here)
In, ihning andfor
In and d"rirg are often used with the same
meaning:
In / During the summer we often go for
long walles.
bu duri.ng shows a particular event against
the background of a period of time:
The manager was released ihning the night ...
especially if it is an interruption:
They walleed out of the hall il.uring the speech.
For shows how long something lasts:
He will remain at the conference for two days ,..
We went to Spainfor the summer.
In shows how soon something happens:
In less than an hour we had heard all about
his aduentures.
I'll meet you in ten minutes.
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