for, during, in, within.
for, during, in, within.
? ?, for.  
, for, :
ߠ ( ).
I lived there (for) three years.
ߠ ( ).
I'll stay there (for) ten days.

?, during:
  .
During the last three months he has made great progress in German.
ߠ .
I spoke to him several times during the evening.

? ,
, in:
( , ).
The construction of this plant was completed in ten months.
( , ).
This work must be done in six days.

? ,
within:
ߠ ( ).
I'll give you an answer within a week.
( , ).
promised to send us the catalogues within five days.

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