3 I've already sharpened my pencil.
I sharpened my pencil a minute ago.
4 I've already turned on the television.
I turned on the television ten minutes ago.
5 I've already boiled the milk.
I boiled the milk yesterday morning.
6 I've already emptied the basket.
I emptied the basket yesterday.
7 I've already asked a question.
I asked the question two minutes ago.
8 I've already typed that letter.
I typed that letter this morning.
9 I've already washed my hands.
I washed my hands five minutes ago.
10 I've already walked across the park.
I walked across the park an hour ago.
11 I've already painted that bookcase.
I painted that bookcase a year ago.
12 I've already dusted the cupboard.
I dusted the cupboard this afternoon.