http://www.bbc.co.uk/worldservice/learningenglish/radio/specials/954_gramchallenge16/ ... Nuala's Grammar Explanation:Time prepositions Nuala: Hi! we heard three different prepositions; at, in and on. We use these prepositions when we're talking about time but we use each one with different time expressions. Listen again: Finn: In the morning, at 3 o'clock. Elena: In 2004. Diarmuid: At midnight, on Christmas Day. Carrie: In December. We use 'at' for times of the day. At half past 7, at midnight, at sunset at breakfast time. Finn: At 3 o'clock Diarmuid: At midnight We use 'on' for days and dates. On the 5th of June, on Tuesdays, on Saturday morning. Diarmuid: On Christmas day. We use 'in' for longer periods of time like months, years, seasons. In April, in 1987, in the winter of '76. Elena: In 2004 Carrie:In December Finally, there are some time expressions that don't use any prepositions at all. Words like 'next', 'last', 'today', 'tomorrow' or 'yesterday'. Diarmuid: Next Christmas we’re going on a cruise. That's all from me, good luck with your grammar challenge! ...
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