[ابو بيشو]

After the breakfast, we went shopping.
After breakfast, we went shopping.
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Before my breakfast I usually go for a run.
Before breakfast I usually go for a run.
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When breakfast lunch dinner etc refer to an event (rather than to the
meal itself), they are used without a/the l my etc: 'What shall we do
after lunch?' 'Pam and Simon have invited us to dinner.' 'What time do
you have breakfast?'
You use a l the l my etc when you refer to the meal itself: 'We enjoyed
the evening, even though the dinner was cold.' 'I don't usually have time
for a cooked breakfast.'