Ⅰ、1、four years ago
2、for an hour
3、since 10 o'clock
4、Five years ago
5、since his eleventh birthday
Ⅱ、1、I have collected erasers since
many years ago .
2、Mike,a 39-year-old Australian ,has been in China for twenty years.
3、Tom has talked with the English teacher about his reading problem since nearly
2 hours ago.
4、My uncle has lived in the small town for four years.
Ⅲ、collected, but, since, played, bigger, owned, bought, felt, for