Prepositions in time clauses

1. The beginning/end

1.1. We´ll payed you at the beginning of next month

1.1.1. Diana cooked pizza to feed his brothers

2. Part of a period time

2.1. We haven´t had a single visit from head office in the last three years.

3. + a number of hours/days/years

3.1. He´s been in the meeting for three hours.

4. To say what time something is needed

4.1. Can you arranged the meeting for 3.30?

5. Exact moments of time

5.1. He planned at four o´clock

5.1.1. How about running a new product?

6. Parts of the day

6.1. The meeting is in the afternoon

7. Months and years

7.1. in April in 2013