1. It started to rain AT lunchtime and it still is. (since)
It..HAS BEEN RAINING SINCE...... lunchtime.
2. He fell asleep at eight o'clock and he hasn't woken up yet. (sleeping)
He .HAS BEEN SLEEPING SINCE...... eight o'cloch.
3. He's spent all day trying to get hold of you on the phone. (been)
He HAS BEEN on..... phone you all day.
4. When my uncle retired, he started to play golf. (take)
When my uncle retired, he.TOOK.... golf