这是现在完成时.如果是过去时的话：
1. He had breakfast at home this morning.
2. He had a meeting yesterday evening
3. John went to the Children's Palace last Sunday
4. I bought a sweater last Wednesday
5. I had a Japanese lesson last Saturday
6. Tom and Mary went to Zhongshan Park last month.
7. Lily had her hair cut last Thursday
8. Uncle Tom mended his wood house three months ago.
9. It was a small village 10 years ago.
10. He gave me two pieces of cake just now.